NASA Mars Rover Curiosity Begins Arm-Work Phase

PASADENA, Calif. -- After driving more than a football field's length since landing, NASA's Mars rover Curiosity is spending several days preparing for full use of the tools on its arm.

Curiosity extended its robotic arm Wednesday in the first of six to 10 consecutive days of planned activities to test the 7-foot (2.1-meter) arm and the tools it manipulates.

"We will be putting the arm through a range of motions and placing it at important 'teach points' that were established during Earth testing, such as the positions for putting sample material into the inlet ports for analytical instruments," said Daniel Limonadi of NASA's Jet Propulsion Laboratory in Pasadena, Calif., lead systems engineer for Curiosity's surface sampling and science system. "These activities are important to get a better understanding for how the arm functions after the long cruise to Mars and in the different temperature and gravity of Mars, compared to earlier testing on Earth."

Since the Mars Science Laboratory spacecraft placed Curiosity inside Mars' Gale Crater on Aug. 5 PDT (Aug. 6 EDT), the rover has driven a total of 358 feet (109 meters). The drives have brought it about one-fourth of the way from the landing site, named Bradbury Landing, to a location selected as the mission's first major science destination, Glenelg.

"We knew at some point we were going to need to stop and take a week or so for these characterization activities," said JPL's Michael Watkins, Curiosity mission manager. "For these checkouts, we need to turn to a particular angle in relation to the sun and on flat ground. We could see before the latest drive that this looked like a perfect spot to start these activities."

The work at the current location will prepare Curiosity and the team for using the arm to place two of the science instruments onto rock and soil targets. In addition, the activities represent the first steps in preparing to scoop soil, drill into rocks, process collected samples and deliver samples into analytical instruments.

Checkouts in the next several days will include using the turret's Mars Hand Lens Imager to observe its calibration target and the Canadian-built Alpha Particle X-Ray Spectrometer to read what chemical elements are present in the instrument's calibration target.

"We're still learning how to use the rover. It's such a complex machine -- the learning curve is steep," said JPL's Joy Crisp, deputy project scientist for the Mars Science Laboratory Project, which built and operates Curiosity.

After the arm characterization activities at the current site, Curiosity will proceed for a few weeks eastward toward Glenelg. The science team selected that area as likely to offer a good target for Curiosity's first analysis of powder collected by drilling into a rock.

"We're getting through a big set of characterization activities that will allow us to give more decision-making authority to the science team," said Richard Cook, Mars Science Laboratory project manager at JPL.

Curiosity is one month into a two-year prime mission on Mars. It will use 10 science instruments to assess whether the selected study area ever has offered environmental conditions favorable for microbial life. JPL manages the mission for NASA's Science Mission Directorate in Washington.

Creative success alliance

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NASA Mars rover Curiosity begins trek to new destination

The Mars rover Curiosity is hitting the road. It headed east Tuesday, driving 52 feet toward a spot where it will use its robotic arm for the first time to drill into bedrock. It'll take weeks for the six-wheel NASA rover to reach the site called Glenelg about a quarter mile away.

"It's nice to see some Martian soil on our wheels," mission manager Arthur Amador said in a statement Wednesday.

The drive was the third and longest one yet since the car-size rover touched down in an ancient crater Aug. 5 to study whether the Martian environment could have been favorable for life. The early drives have been deliberately short, allowing Curiosity to identify any hazards on the road and so that engineers can gain practice driving on the Martian terrain.

Scientists have said they eventually expect the rover to travel about the length of a football field a day. Curiosity spent Wednesday at its new locale, snapping pictures of a distant mountain that is its ultimate destination. Intriguing layers of rocks have been spotted at the base and most of its two-year mission will be spent examining the lower slopes.

Since landing, Curiosity has been busy checking out its instruments and it's not done yet. Next week, it will make a longer stop along the way to Glenelg to continue its health checkups.

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Launch Director Hails Curiosity Landing

Omar Baez completed his eighth trip to Mars on Monday when NASA's Curiosity rover touched down perfectly inside the Gale Crater to begin a two-year geologic survey of the mysterious red planet. As with everyone else on Earth, Baez can only go to Mars remotely, but that doesn't diminish his excitement.

Nine months ago, Baez was carefully going over the details of Curiosity ahead of its launch on a United Launch Alliance Atlas V rocket. As launch director for NASA's Launch Services Program, it was up to Baez to confirm that the one-ton robotic rover was ready to make a months-long voyage through space to a planet 14 million miles away.

On Nov. 26, 2011, Baez gave his "go" to start the mission, offering his confidence that everything he had seen showed that the rover was ready. Not to mention the rocket pack that would fly through the Martian atmosphere and lower Curiosity onto the surface in a landing maneuver that had never been tried before.

Although he checked out everything several times in a processing hangar on Earth and worked closely with the rover's builders and operators from the Jet Propulsion Laboratory in Pasadena, Calif., he still had an anxious night watching the landing on TV.

"I think there's been roughly 7,000 people who have worked on this," Baez said Monday morning. "There's a personal sense of ownership and some skin that went into making this happen. So I am overjoyed. I was so ecstatic to see them succeed and see this thing on the surface."

Before the mission was launched, and knowing how difficult the entry and landing would be, Baez said he would call the flight a success if the rover landed and returned some video and photos of the barren Martian landscape. That goal has been met, but Baez said he is on to the next level of expectations from Curiosity.

"I think I'm still numb, I'm still waiting for more pictures," Baez said. "I want to see the thing roll around and rove. I'm not ready to pop the champagne corks yet." The landing buoyed the whole launch team. "Everyone's walking with a spring in their step, just having a good time," Baez said. "Overall, it's a great feeling."

Even after launching eight spacecraft to Mars, Baez' work with the red planet is not finished. The Launch Services Program is working toward the launch of the MAVEN mission, a spacecraft that will study Mars from orbit. MAVEN, short for Mars Atmosphere and Volatiles EvolutioN, is to look for clues as to why the Martian atmosphere changed and why its surface water was lost to space. It is to launch in late 2013.

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Dust Dominates Foreign Aerosol Imports to North America

NASA and university scientists have made the first measurement-based estimate of the amount and composition of tiny airborne particles that arrive in the air over North America each year. With a 3-D view of the atmosphere now possible from satellites, the scientists calculated that dust, not pollution, is the main ingredient of these imports.

According to a new analysis of NASA satellite data, 64 million tons of dust, pollution and other particles that have potential climate and human health effects survive a trans-ocean journey to arrive over North America each year. This is nearly as much as the estimated 69 million tons of aerosols produced domestically from natural processes, transportation and industrial sources. The results were published Aug. 2 in the journal Science.

"This first-of-a-kind assessment is a crucial step toward better understanding how these tiny but abundant materials move around the planet and impact climate change and air quality," says Hongbin Yu, lead author and an atmospheric scientist at the University of Maryland, College Park, and NASA's Goddard Space Flight Center in Greenbelt, Md.

Observing these microscopic airborne particles and quantifying their global impact on warming or cooling Earth remains one of the most difficult challenges of climate science. Dust and pollution particles rise into the atmosphere and can travel for days across numerous national boundaries before settling to Earth.

Data from several research satellites flying advanced observing technology developed and launched by NASA enabled the scientists to distinguish particle types and determine their heights in the atmosphere. They combined that information with wind speed data to estimate the amount of pollution and dust arriving over North America. The scientists used data from instruments on NASA's Terra satellite and the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite, a joint effort between NASA and the French space agency, Centre National d'Etudes Spatiales.

Yu and colleagues estimated that dust crossing the Pacific Ocean accounts for 88 percent, or 56 milliontons, of the total particle import to North America every year. Dust movement is particularly active in spring, when the rise of cyclones and strong mid-latitude westerlies boost particle transport across the Pacific. Global aerosol transport models revealed Asia was a primary source of the dust reaching North America. About 60 to 70 percent comes from Asia, and the remaining 30 to 40 percent comes from Africa and the Middle East.

Dust particles are fine pieces of minerals that primarily come from dry, desert-like regions. Winds lift these lightweight particles high into the atmosphere where they meet even faster-moving winds capable of transporting them around the planet. Pollution particles, in contrast, come from combustion sources such as wildfires or agricultural fires and fossil fuel burning for power and industry. These particles are emitted close to the ground, making them of prime interest to air quality researchers and managers. High-altitude dust particles are less a concern for human health, but their impact on climate can be significant.

One such impact on climate is a cooling effect, brought about by dust and some pollution particles that reflect sunlight back to space. The team calculated that the imported particles account for one third of the reduction in solar radiation, or solar dimming, over North America. "Globally this can mask some of the warming we expect from greenhouse gases," says Lorraine Remer, an atmospheric scientist at University of Maryland, Baltimore County, and co-author on the study.

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NASA launches hypersonic inflatable heat shield prototype

NASA launched a novel new heat shield prototype on a successful test flight Monday (July 23), a mission that sent a high-tech space balloon streaking through Earth's atmosphere at hypersonic speeds of up to Mach 10.

The test flight blasted off atop a suborbital rocket at 7:01 a.m. EDT (1101 GMT) from NASA's Wallops Flight Facility on Wallops Island, Va. It sent a small capsule, called the Inflatable Re-entry Vehicle Experiment 3 (IRVE-3) into suborbital space, which deployed the inflatable heat shield and then plunged back down through Earth's atmosphere to splash down in the Atlantic Ocean.

The mission, according to NASA, was an unqualified success and will help shape new re-entry systems for future spacecraft.

"We had a really great flight today," James Reuther, deputy director of NASA's Space Technology Program, told reporters in a news briefing Monday (July 23). "Initial indications are we got good data. Everything performed as well, or better, than expected."

The IRVE-3 flight was designed to demonstrate how the technology could be used for heat shields during atmospheric entries on future space missions.

The successful test flight is, "a first step for how we explore other worlds," said Steve Jurczyk, deputy director of NASA's Langley Research Center in Hampton, Va.

"As far as the applicability of the technology, [we were] originally motivated to do this to allow us to potentially land more masses at Mars," said Neil Cheatwood, IRVE-3 principal investigator at Langley Research Center. "Mars is a very challenging destination. It has a very thin atmosphere — too much of an atmosphere to ignore, but not enough for us to do the things we would at other planets. That was our motivation about nine years ago when we started doing this stuff."

With inflatable heat shields, scientists may be able to land at higher altitudes on Mars, or use the IRVE-3 technology to one day carry larger payloads, including humans, to the surface of the Red Planet, Cheatwood added. 

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NASA builds menu for planned Mars mission in 2030s

HOUSTON (AP) ― Through a labyrinth of hallways deep inside a 1950s-era building that has housed research that dates back to the origins of U.S. space travel, a group of scientists in white coats is stirring, mixing, measuring, brushing and, most important, tasting the end result of their cooking.

Their mission: Build a menu for a planned journey to Mars in the 2030s.

The menu must sustain a group of six to eight astronauts, keep them healthy and happy and offer a broad array of food. That’s no simple feat considering it will likely take six months to get to the Red Planet, astronauts will have to stay there 18 months and then it will take another six months to return to Earth. Imagine having to shop for a family’s three-year supply of groceries all at once and having enough meals planned in advance for that length of time.

“Mars is different just because it’s so far away,” said Maya Cooper, senior research scientist with Lockheed Martin who is leading the efforts to build the menu. “We don’t have the option to send a vehicle every six months and send more food as we do for International Space Station.”

Astronauts who travel to the space station have a wide variety of food available to them, some 100 or so different options, in fact. But it is all pre-prepared and freeze-dried with a shelf life of at least two years. And while astronauts make up a panel that tastes the food and gives it a final OK on Earth before it blasts off, the lack of gravity means smell ― and taste ― is impaired. So the food is bland.

On Mars though, there is a little gravity, allowing NASA to consider significant changes to the current space menu. That’s where Cooper’s team comes in. Travel to Mars opens the possibility that astronauts can do things like chop vegetables and do a little cooking of their own. Even though pressure levels are different than on Earth, scientists think it will be possible to boil water with a pressure cooker too.

One option Cooper and her staff are considering is having the astronauts care for a “Martian greenhouse.” They would have a variety of fruits and vegetables ― from carrots to bell peppers ― in a hydroponic solution, meaning they would be planted in mineral-laced water instead of soil. The astronauts would care for their garden and then use those ingredients, combined with others, such as nuts and spices brought from Earth, to prepare their meals.

“That menu is favorable because it allows the astronauts to actually have live plants that are growing, you have optimum nutrient delivery with fresh fruits and vegetables, and it actually allows them to have freedom of choice when they’re actually cooking the menus because the food isn’t already pre-prepared into a particular recipe,” Cooper said.

The top priority is to ensure that the astronauts get the proper amount of nutrients, calories and minerals to maintain their physical health and performance for the life of the mission, Cooper said.

The menu must also ensure the psychological health of the astronauts, Cooper explained, noting studies have shown that eating certain foods ― such as meatloaf and mashed potatoes or turkey on Thanksgiving ― improve people’s mood and give them satisfaction. That “link to home” will be key to astronauts on the Mars mission, and there are currently two academic studies looking further into the connection between mood and food. Lacking certain vitamins or minerals can also harm the brain, she said.

Jerry Linenger, a retired astronaut who spent 132 days on the Russian space station in 1997, said food is important for morale, and the monotony of eating the same thing day after day is difficult.

“You just wanted something different. I didn’t care if it was something I wouldn’t eat in a million years on Earth. If it was different, I would eat it,” Linenger said, recalling with a laugh how he would even drink up a Russian sour milk-like concoction for breakfast or drink up some borscht because it offered variety.

Already, Cooper’s team of three has come up with about 100 recipes, all vegetarian because the astronauts will not have dairy or meat products available. It isn’t possible to preserve those products long enough to take to Mars ― and bringing a cow on the mission is not an option, Cooper jokes.

To ensure the vegetarian diet packs the right amount of protein, the researchers are designing a variety of dishes that include tofu and nuts, including a Thai pizza that has no cheese but is covered with carrots, red peppers, mushrooms, scallions, peanuts and a homemade sauce that has a spicy kick.

To keep this menu going, and get the most out of any research about food sustainability on Mars, Cooper says it’s possible NASA will choose to have one astronaut solely dedicated to preparing the food ― the Emeril of the Mars mission.

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NASA's Car-Sized Rover Nears Daring Landing on Mars

PASADENA, Calif. -- NASA's most advanced planetary rover is on a precise course for an early August landing beside a Martian mountain to begin two years of unprecedented scientific detective work. However, getting the Curiosity rover to the surface of Mars will not be easy.

"The Curiosity landing is the hardest NASA mission ever attempted in the history of robotic planetary exploration," said John Grunsfeld, associate administrator for NASA's Science Mission Directorate, at NASA Headquarters in Washington. "While the challenge is great, the team's skill and determination give me high confidence in a successful landing."

The Mars Science Laboratory mission is a precursor for future human missions to Mars. President Obama has set a challenge to reach the Red Planet in the 2030s.

To achieve the precision needed for landing safely inside Gale Crater, the spacecraft will fly like a wing in the upper atmosphere instead of dropping like a rock. To land the 1-ton rover, an airbag method used on previous Mars rovers will not work. Mission engineers at NASA's Jet Propulsion Laboratory in Pasadena, Calif., designed a "sky crane" method for the final several seconds of the flight. A backpack with retro-rockets controlling descent speed will lower the rover on three nylon cords just before touchdown.

During a critical period lasting only about seven minutes, the Mars Science Laboratory spacecraft carrying Curiosity must decelerate from about 13,200 mph (about 5,900 meters per second) to allow the rover to land on the surface at about 1.7 mph (three-fourths of a meter per second). Curiosity is scheduled to land at approximately 10:31 p.m. PDT on Aug. 5 (1:31 a.m. EDT on Aug. 6).

"Those seven minutes are the most challenging part of this entire mission," said Pete Theisinger, the mission's project manager at JPL. "For the landing to succeed, hundreds of events will need to go right, many with split-second timing and all controlled autonomously by the spacecraft. We've done all we can think of to succeed. We expect to get Curiosity safely onto the ground, but there is no guarantee. The risks are real."

During the initial weeks after the actual landing, JPL mission controllers will put the rover through a series of checkouts and activities to characterize its performance on Mars, while gradually ramping up scientific investigations. Curiosity then will begin investigating whether an area with a wet history inside Mars' Gale Crater ever has offered an environment favorable for microbial life.

"Earlier missions have found that ancient Mars had wet environments," said Michael Meyer, lead scientist for NASA's Mars Program at NASA Headquarters. "Curiosity takes us the next logical step in understanding the potential for life on Mars."

Curiosity will use tools on a robotic arm to deliver samples from Martian rocks and soils into laboratory instruments inside the rover that can reveal chemical and mineral composition. A laser instrument will use its beam to induce a spark on a target and read the spark's spectrum of light to identify chemical elements in the target.

Other instruments on the car-sized rover will examine the surrounding environment from a distance or by direct touch with the arm. The rover will check for the basic chemical ingredients for life and for evidence about energy available for life. It also will assess factors that could be hazardous for life, such as the radiation environment.

"For its ambitious goals, this mission needs a great landing site and a big payload," said Doug McCuistion, director of the Mars Exploration Program at NASA Headquarters. "During the descent through the atmosphere, the mission will rely on bold techniques enabling use of a smaller target area and a heavier robot on the ground than were possible for any previous Mars mission. Those techniques also advance us toward human-crew Mars missions, which will need even more precise targeting and heavier landers."

The chosen landing site is beside a mountain informally called Mount Sharp. The mission's prime destination lies on the slope of the mountain. Driving there from the landing site may take many months.

"Be patient about the drive. It will be well worth the wait and we are apt to find some targets of interest on the way," said John Grotzinger, MSL project scientist at the California Institute of Technology in Pasadena. "When we get to the lower layers in Mount Sharp, we'll read them like chapters in a book about changing environmental conditions when Mars was wetter than it is today."

In collaboration with Microsoft Corp., a new outreach game was unveiled Monday to give the public a sense of the challenge and adventure of landing in a precise location on the surface. Called "Mars Rover Landing," the game is an immersive experience for the Xbox 360 home entertainment console that allows users to take control of their own spacecraft and face the extreme challenges of landing a rover on Mars.

"Technology is making it possible for the public to participate in exploration as it never has before," said Michelle Viotti, JPL's Mars public engagement manager. "Because Mars exploration is fundamentally a shared human endeavor, we want everyone around the globe to have the most immersive experience possible." 

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NASA hopes are riding on Mars rover's tricky descent

It is the last 78 miles of a NASA rover's 154 million-mile journey to Mars that concerns Ravi Prakash the most.

That's because this is the first time that NASA - or anyone else - has ever tried to land something nearly so big as the 1-ton Curiosity rover on Mars, and because so much is riding on this particular mission.

"We've got to go from five times as fast as a speeding bullet - 13,000 mph - all the way to a screeching halt in seven minutes," said Prakash, a Texas City native who now works at NASA's Jet Propulsion Laboratory on the rover's lander team.

Five times the size of the Spirit and Opportunity rovers already on Mars, Curiosity is packed with scientific equipment: HD-resolution cameras that can also capture video; a laser than can ignite a spark on rocks 20 feet away to determine what they're made of; and other high-tech tools including an X-ray diffraction setup, a mass spectrometer, and a gas chromatograph.

With these devices the six-wheeled rover will be able to sample hundreds of layers of sedimentary rock, allowing scientists to understand how the surface of Mars changed over time, and providing a detailed history of the Red Planet and clues to whether life could have flourished there.

But it's got to get there safely at first.Adding to the pressure is that NASA is not currently planning or building a next generation rover to go to Mars. More than 200 scientists attended a NASA meeting earlier this year in Houston to discuss plans for follow-up missions, but none has been chosen.

Nail-biting time

So Curiosity, itself a decade in the works, is it for a long time."With no sense of how or when we will follow this up, and without knowing which direction our tools and techniques are evolving - yes, landing successfully is a big deal," said Mark Lemmon, a Texas A&M University planetary scientist who will help operate the rover on Mars.

Launched in November, the $2.5 billion rover will reach the upper limit of the Martian atmosphere at 12:30 a.m. CDT on Aug. 6. Almost out of rocket fuel, it will proceed directly to the planet's surface.

Then the nail-biting will begin. The capsule carrying the rover will slow as it falls through the thin Martian atmosphere, and at seven miles above the Red Planet a parachute will deploy. One mile above the surface, and at a speed of 180 mph, the parachute will separate, and thrusters will further slow the descent.

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NASA Unveils Orion During Ceremony

The Orion capsule that will make the first flight test into space was celebrated Monday morning as the cornerstone of a new era of exploration for America's space program.

The spacecraft's aluminum-alloy crew pressure module arrived at NASA's Kennedy Space Center in Florida on Friday, June 29, where it will be built up into a fully functioning spacecraft ahead of a test flight slated for 2014.

"This starts a new, exciting chapter in this nation's great space exploration story," said Lori Garver, NASA deputy administrator. "Today we are lifting our spirits to new heights."

Orion will be the most advanced spacecraft ever designed. It will provide emergency abort capability, sustain astronauts during space travel and provide safe re-entry from deep space.

The 2014 uncrewed flight, called Exploration Flight Test-1 or EFT-1, will be loaded with a wide variety of instruments to evaluate how the spacecraft behaves during launch, in space and the through the searing heat of reentry.

Later Orion spacecraft will take astronauts on missions to destinations far beyond Earth, such as to an asteroid and Mars.

"Ladies and gentlemen, we're going to Mars," proclaimed U.S. Sen. Bill Nelson, D-Fla., who joined Garver and other officials to welcome the Orion spacecraft. "We know the Orion capsule is a critical part of the system that's going to take us there."

Designed with astronauts in mind, Orion will take crews beyond low-Earth orbit for the first time since 1972, when Apollo 17 completed the last moon landing. The Space Launch System, or SLS -- a gigantic rocket akin to the Saturn V that launched the Apollo spacecraft -- is being developed to launch future Orion missions to deep space. The first launch of the SLS, with Orion atop, is scheduled for 2017.

Astronaut Rex Walheim, who flew on the final space shuttle mission and has had a leading role in the development of Orion, said the capsule can be the principal spacecraft for 30 years of human exploration of the solar system.

"It's the first in a line of vehicles that can take us where we've never gone before," Walheim said. "It'll be a building block approach, we'll have to have a lander and a habitation module, but we can get there."

Although the design is reminiscent of the landmark Apollo capsule that took men to the moon, the interior of the spacecraft if significantly more advanced. Its guidance, navigation and life support equipment have seen significant improvements in size and capabilities.

"The systems on this spacecraft, it's bigger than Apollo and it has to stay in space longer than Apollo, so it has to be better than Apollo," said Bob Cabana, director of Kennedy and a former shuttle commander.

For now, the focus for NASA and Lockheed Martin, the spacecraft's builder, is on preparing this capsule for space in 2014. During the EFT-1 mission, a Delta IV-Heavy rocket from United Launch Alliance will lift the spacecraft into orbit. Its second stage will remain attached to the capsule and will be fired to raise the Orion's orbit to 3,600 miles, about 15 times higher than the International Space Station. The mission will last only a few hours, long enough to make two orbits before being sent plunging back into the atmosphere to test it at deep-space reentry speeds.

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NASA details looming Mars rover landing, '7 Minutes of Terror'

In just 41 days, on August 5, NASA's Mars Science Laboratory rover will touch down on the Red Planet, and this will be no ordinary landing. In fact, NASA has dubbed the descent "Seven Minutes of Terror."

"When people look at it, it looks crazy," senior EDL engineer at the Jet Propulsion Laboratory Adam Steltzner said in a new video by NASA on the rover landing. "It is the result of reasoned engineering thought, but it still looks crazy."

The recently released video (see below) outlines exactly how crazy the feat of landing the rover actually is. Named Curiosity, the rover must tear through Mars' atmosphere, which takes up to seven minutes. However, transmitting a signal to Earth of its progress takes 14 minutes because of the distance between the planets.

"When we first get word that we've touched the top of atmosphere the vehicle has been alive or dead for at least seven minutes," Steltzner said.

In those seven minutes, NASA engineers have set up a complex sequence of procedures that must be followed in order to avoid disaster. First, they will deploy a parachute to slow the more than 1,000 mph descent. Then cutting off the chute, they'll fire up rockets to slow the vertical velocity even more, and lastly they will lower the rover on a tether into a crater to avoid a harmful dust cloud.

"If any one thing doesn't work just right, it's game over," EDL engineer Tom Rivellini said in the video.

The most complex and scientifically powerful robotic spacecraft ever built to explore the surface of another planet, Curiosity cost NASA $2.5 billion to build. It was launched last November, beginning its voyage to Mars and its mission is to look for organic compounds and signs of past or present habitability.

The rover is the size of a small car and weighs 1,982 pounds. It is equipped with 17 cameras, a 7-foot-long robot arm, and a suite of 10 state-of-the-art scientific sensors and experiments weighing 125 pounds. In contrast, NASA's hugely successful Mars Exploration Rovers, Spirit and Opportunity, each weighed about 385 pounds, including just 20 pounds of miniaturized science hardware.

Curiosity is set to touch down at 10:31 p.m. PDT on August 5.

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Dream Chaser Flight Vehicle Scales Rocky Mountain Summits

Sierra Nevada Corporation (SNC) Space Systems' Dream Chaser design passed one of its most complex tests to date with a successful captive-carry test conducted near the Rocky Mountain Metropolitan Airport in Jefferson County, Colo., on May 29.

Just like the space shuttle before it, SNC's Dream Chaser will go through extensive testing to prove its wings will work. The company built a full-scale flight vehicle of the Dream Chaser spacecraft to carry out the evaluations.

Backdropped by skyscraping summits, an Erickson Air-Crane helicopter lifted the full-scale orbital crew vehicle to verify proper aerodynamic flight performance. Future plans call for the flight vehicle to be released to evaluate the design's handling during the landing phase of a mission.

The captive-carry test marks the completion of another milestone for the Dream Chaser Space System as part of the Commercial Crew Development Round 2 (CCDev2) agreement with NASA's Commercial Crew Program (CCP).

"This is a very positive success for the Dream Chaser team and their innovative approach. I applaud and encourage the designers and engineers to continue their efforts in meeting the objectives of the rest of their CCDev2 milestones," said Ed Mango, CCP program manager.

SNC is one of seven companies working to develop commercial crew transportation capabilities to ferry U.S. astronauts to and from low Earth orbit and the International Space Station. The Dream Chaser is designed to carry as many as seven astronauts to space, and is the only spacecraft under CCDev2 that incorporates wings and is designed to land on a conventional runway.

"The successful captive-carry flight test of the Dream Chaser full-scale flight vehicle marks the beginning of SNC's flight test program; a program that could culminate in crewed missions to the International Space Station for NASA," said Steve Lindsey, former NASA astronaut and head of Dream Chaser's flight operations for SNC.

Before the company took to the Rocky Mountain skies, it conducted an interface test to demonstrate the release mechanism between the Dream Chaser prototype and the heavy-lift helicopter. It also conducted a ground-based landing gear drop test and a thorough flight test readiness review with engineers, technical experts and representatives from SNC and NASA.

Another recent milestone included an evaluation of the separation system compatibility of Dream Chaser with its initial launch vehicle, the United Launch Alliance Atlas V rocket, which would be used to release the spacecraft from the rocket’s second stage after it has placed the spacecraft into low Earth orbit.

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Forest Recovering from Mt. St. Helens Explosion

Mt. St. Helens exploded 32 years ago on May 18. It began with a small series of earthquakes and culminated with the volcano erupting, a cataclysmic collapse of the flank of the mountain and the largest landslide in recorded history.

This time series of data shows the explosion and subsequent recovery of life on the volcano. Landsat, a satellite program operated by NASA and the U.S. Geological Survey acquired the images between 1979 and 2011. In them, scientists have an unprecedented opportunity to witness how life recovers from devastation.

The animation begins with vegetation as red because early Landsat satellites couldn't 'see' blue light. That changed with launch of Landsat 5 in 1984 and its natural color abilities.

The collapse of the mountain was like uncorking a bottle of champagne. Fifty-seven people died when rocks, hot ash, gas and steam exploded out of the Earth. The blast debris, which is gray in the images, covered over 230 square miles (600 square kilometers) and blew down 4 billion board-feet of timber.

The landslide buried 14 miles (23 kilometers) of the North Fork Toutle River with an average of 150 feet (46 meters) of rocks, dirt and uprooted trees. In some places the debris was as deep as 600 feet (180 meters) high.

The squarish beige patches visible in the upper right and lower left of the animation show logging on the mountain both before and after the eruption.

This image was created using the reflected light from the near infrared, green and red portions of the spectrum from instruments aboard Landsat satellites 2 and 3 and from the blue, green and red portions of the spectrum from instruments aboard Landsat satellites 5 and 7.

Landsat 2 launched in 1975 and provided scientific data for 7 years until 1982. Landsat 3 launched in 1978 and ran for 5 years until1983. NASA launched Landsat 5 in 1984 and it ran for a record-breaking 28 years. Landsat 7 is still up and running; it was launched in 1999. The data from these and other Landsat satellites has been instrumental in our understanding of forest health, storm damage, agricultural trends, urban growth and many other ongoing changes to our land. 

Nasa to put man on asteroid by 2020s

Washington: Nasa is reportedly training a team of astronauts for a mission to land on an asteroid by the end of the next decade.The US space agency is training the astronauts to land on an asteroid to explore its surface, search for minerals and even learn the skills they may need to destroy it should one pose a threat to the Earth, 'The Daily Telegraph' reported.

Nasa plans to send the team to make contact with an asteroid up to three million miles away by the late 2020s; it would take them far beyond the current limit of the Moon, which is 239,000 miles from Earth.Travelling at around 50,000 miles per hour around the Sun with almost non-existent gravity due to their small size, landing safely on these space rocks will present a significant challenge.

But, Major Tim Peake, a British astronaut with the European Space Agency, who is also being trained for the asteroid mission, said: "With the technology we have available and are developing today, an asteroid mission of up to a year is definitely achievable."He added: "Asteroids are interesting on a number of different levels. Nasa is focused on the science you can achieve as asteroids are essentially a historical record of billions of years of universe where we can take samples from.

"These objects are also coming extremely close to Earth all the time, but we rarely hear about it. With enough warning we would probably send a robotic mission to deflect an asteroid, but if something is spotted late... we may have to look at manned missions to deflect it."That is when the skills we are learning about how to work on an asteroid could be useful."

In fact, Nasa hopes to launch an unmanned spacecraft that will use a robotic arm to collect samples from an asteroid by 2016 before sending a manned mission by the late 2020s. A manned mission will aim to rendezvous with an asteroid up to three million miles from the Earth, taking around a year to make the entire round trip.

Dragon Expected to Set Historic Course

As scheduled, the mission will be the first to see a privately built and funded spacecraft rendezvous with the station. If successful, the mission is expected to pave the way toward regular operational commercial cargo missions.

"It's almost like the lead-up to Apollo, in my mind," said Mike Horkachuck, NASA's project executive for SpaceX. "You had Mercury then you had Gemini and eventually you had Apollo. This would be similar in the sense that, we're not going to the moon or anything as spectacular as that, but we are in the beginnings of commercializing space. This may be the Mercury equivalent to eventually flying crew and then eventually leading to, in the long run, passenger travel in space."

California-based Space Exploration Technologies, known as SpaceX, is preparing to launch an ambitious mission to dock its Dragon spacecraft to the space station and return it to Earth. The spacecraft will not have a crew, but will carry about 1,200 pounds of cargo that the astronauts and cosmonauts living on the station will be able to use. The capsule will go into space atop a Falcon 9 rocket also built by SpaceX.

Elon Musk, the owner of SpaceX and the company's chief designer, said his team is not taking the mission's objectives for granted, particularly since both the Dragon spacecraft and Falcon 9 rocket are relatively new to spaceflight.

"We have launched the rocket twice and the spacecraft once so they are pretty new, and the proximity operations will be our first test in space," Musk said following the Flight Readiness Review. "I think it’s important to appreciate that this is fairly tricky and it is important to remember that we are hitting a target within a few inches while it moves over 17,000 mph."

Because the mission is a test flight, the cargo is not material deemed critical to the crew, Horkachuck said. Launch is targeted for May 7 from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida, within sight of the launch pads the space shuttles used to carry the station's components into orbit. There also are several tests and reviews coming up later this month similar to those performed ahead of space shuttle missions.

If this mission is successful, the Dragon is expected to become operational and launch regular supply runs to the station. Unlike any other cargo carrier, the Dragon can bring things back to Earth, too, a boon for scientists whose research is taking place on the orbiting laboratory.

SpaceX already has two successful Falcon 9 launches to its credit, along with a history making demonstration of the Dragon capsule that in December 2010, became the first privately built and operated spacecraft to be launched to and recovered from Earth orbit.

The mission is expected to last about 21 days, Horkachuck said. 

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Fermi Observations of Dwarf Galaxies Provide New Insights on Dark Matter

There's more to the cosmos than meets the eye. About 80 percent of the matter in the universe is invisible to telescopes, yet its gravitational influence is manifest in the orbital speeds of stars around galaxies and in the motions of clusters of galaxies. Yet, despite decades of effort, no one knows what this "dark matter" really is. Many scientists think it's likely that the mystery will be solved with the discovery of new kinds of subatomic particles, types necessarily different from those composing atoms of the ordinary matter all around us. The search to detect and identify these particles is underway in experiments both around the globe and above it.

Scientists working with data from NASA's Fermi Gamma-ray Space Telescope have looked for signals from some of these hypothetical particles by zeroing in on 10 small, faint galaxies that orbit our own. Although no signals have been detected, a novel analysis technique applied to two years of data from the observatory's Large Area Telescope (LAT) has essentially eliminated these particle candidates for the first time.

"In effect, the Fermi LAT analysis compresses the theoretical box where these particles can hide," said Jennifer Siegal-Gaskins, a physicist at the California Institute of Technology in Pasadena, Calif., and a member of the Fermi LAT Collaboration. Earlier today, she discussed the latest results of space-based dark matter searches in an invited talk at a meeting of the American Physical Society (APS) in Atlanta, Ga.

WIMPs, or Weakly Interacting Massive Particles, represent a favored class of dark matter candidates. Some WIMPs may mutually annihilate when pairs of them interact, a process expected to produce gamma rays -- the most energetic form of light -- that the LAT is designed to detect.

"One of the best places to look for these faint gamma-ray signals is in dwarf spheroidal galaxies, small satellites of our own Milky Way galaxy that we know possess large amounts of dark matter," Siegal-Gaskins explained. "From an astrophysical perspective, these are downright boring systems, with little gas or star formation and no objects like pulsars or supernova remnants that emit gamma rays."

In addition, many dwarfs lie far away from the plane of our galaxy, which produces a broad band of diffuse gamma-ray emission that stretches all around the sky. Selecting only dwarf galaxies at great distances from this plane helps minimize interference from the Milky Way.

The team examined two years of LAT-detected gamma rays with energies in the range from 200 million to 100 billion electron volts (GeV) from 10 of the roughly two dozen dwarf galaxies known to orbit the Milky Way. Instead of analyzing the results for each galaxy separately, the scientists developed a statistical technique -- they call it a "joint likelihood analysis" -- that evaluates all of the galaxies at once without merging the data together. No gamma-ray signal consistent with the annihilations expected from four different types of commonly considered WIMP particles was found.

For the first time, the results show that WIMP candidates within a specific range of masses and interaction rates cannot be dark matter. A paper detailing these results appeared in the Dec. 9, 2011, issue of Physical Review Letters.

"The fact that we look at 10 dwarf galaxies jointly not only increases the statistics, but it also makes the analysis much less sensitive to fluctuations in the gamma-ray background and to uncertainties in the way the dark matter may be distributed around the dwarfs," said Maja Llena Garde, a graduate student at Stockholm University in Sweden and a co-author of the study.

For any given properties of a dark matter particle, the distribution of the particles has a significant impact on the expected gamma-ray signal, a wrinkle that often is handled inadequately, if at all, in previous studies.

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5 NASA rockets to light up stretch of East Coast skies

A quintuple rocket launch promises to put on a spectacular, but brief, overnight light show of luminescent vapor trails in the skies above the U.S. East Coast tonight, weather permitting. The sky display may puzzle and amaze some unsuspecting observers, so before you make that phone call to your local news or police, here is why this is happening and when you may see it.

The bright phenomenon will be caused by NASA's Anomalous Transport Rocket Experiment (ATREX), which will launch five chemical-bearing suborbital rockets in about five minutes to test the flow of winds and electrical currents at high altitudes. The rockets will blast off from NASA's Wallops Flight Facility on Wallops Island, Va., on the Atlantic coast during a window that opens tonight at midnight EDT and closes at 1:30 a.m. EDT Thursday.

As part of the mission, the five rockets will each release a chemical tracer that should inscribe brilliant milky white trails in the nighttime sky and allow scientists and the general public to actually "see" high-altitude winds at the edge of space, according to a NASA description.

Midnight launch lights
If all goes well, NASA intends to photograph the trails from three different sites: Wallops Island, southern New Jersey and the outer banks of North Carolina. Should weather conditions be unfavorable, the firings will be delayed to another night, with alternate launch dates available between March 16 and April 3.

Three different types of sounding rockets will be used to create the five cloud trails: two Terrier Improved Malemutes, two Terrier Improved Orions and one Terrier Oriole. These small rockets are powerful enough to launch instruments off the planet on short flights, but not strong enough to reach orbit and circle the Earth.

Each rocket will eject a stream of the chemical trimethyl aluminum (TMA), which will be illuminated at high altitudes by the sun (which will be below the local horizon at ground level). Initially, the clouds are expected to glow in reddish hues, then quickly turn to white, They could persist in the sky for as long as 20 minutes before fading completely away.

The ATREX project is aimed at gathering information to better understand the processes responsible for the high-altitude jet stream winds located 60 to 65 miles (97 to 105 kilometers) above the surface of the Earth.

That works out to a potential viewing radius of up to 450 miles (725 km), suggesting that the resultant cloud trails might be glimpsed from perhaps as far north as southern Vermont and New Hampshire, as far south as the border of coastal North and South Carolina and as far west as central West Virginia.


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NASA's Goddard, Glenn Centers Look to Lift Space Astronomy out of the Fog

A fogbank is the least useful location for a telescope, yet today's space observatories effectively operate inside one. That's because Venus, Earth and Mars orbit within a vast dust cloud produced by comets and occasional collisions among asteroids. After the sun, this so-called zodiacal cloud is the solar system's most luminous feature, and its light has interfered with infrared, optical and ultraviolet observations made by every astronomical space mission to date.

"To put it simply, it has never been night for space astronomers," said Matthew Greenhouse, an astrophysicist at NASA's Goddard Space Flight Center in Greenbelt, Md. Light from zodiacal dust can be a thousand times brighter than the sources astronomers actually target, limiting sensitivity in much the same way that bright moonlight hampers ground-based observatories. The dust and its unwanted illumination are greatest in the plane of Earth's orbit, the same plane in which every space telescope operates.

Placing future astronomy missions on more tilted orbits would let spacecraft spend significant amounts of time above and below the thickest dust and thereby reduce its impact on observations. So Greenhouse teamed with Scott Benson at NASA's Glenn Research Center in Cleveland, Ohio, to investigate how these "dark sky" or extra-zodiacal orbits might improve mission science and to develop a means of cost-effectively reaching them.

"Just by placing a space telescope on these inclined orbits, we can improve its sensitivity by a factor of two in the near-ultraviolet and by 13 times in the infrared," Greenhouse explained. "That's a breakthrough in science capability with absolutely no increase in the size of the telescope's mirror."

Greenhouse, Benson and the COllaborative Modeling and Parametric Assessment of Space Systems (COMPASS) study team at NASA Glenn designed a mission that utilizes new developments in solar arrays, electric propulsion and lower-cost expendable launch vehicles. Their proof-of-concept mission is the Extra-Zodiacal Explorer (EZE), a 1,500-pound EX-class observatory that could accommodate a telescope in the size range of the recently completed WISE mission — all within the cost and schedule constraints of NASA’s Explorer Program.

Launched on a SpaceX Falcon 9 rocket, EZE would use a powerful new solar-electric drive as an upper stage to direct the spacecraft on a gravity-assist maneuver past Earth or Mars. This flyby would redirect the mission into an orbit inclined by as much as 30 degrees to Earth's.

The result, the scientists say, will be the highest-performance observatory ever achieved in the decades-long history of NASA's Explorer program.

"We see EZE as a game-changer, the first step on a new path for NASA Explorers that will yield major science goals despite limited resources," said Benson, who previously managed the new electric propulsion technology project.


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NASA finds thickest parts of Arctic ice cap melting faster

A new NASA study revealed that the oldest and thickest Arctic sea ice is disappearing at a faster rate than the younger and thinner ice at the edges of the Arctic Ocean's floating ice cap. The thicker ice, known as multi-year ice, survives through the cyclical summer melt season, when young ice that has formed over winter just as quickly melts again. The rapid disappearance of older ice makes Arctic sea ice even more vulnerable to further decline in the summer, said Joey Comiso, senior scientist at NASA Goddard Space Flight Center, Greenbelt, Md., and author of the study, which was recently published in Journal of Climate.

The new research takes a closer look at how multi-year ice, ice that has made it through at least two summers, has diminished with each passing winter over the last three decades. Multi-year ice "extent" -- which includes all areas of the Arctic Ocean where multi-year ice covers at least 15 percent of the ocean surface -- is diminishing at a rate of -15.1 percent per decade, the study found.

There's another measurement that allows researchers to analyze how the ice cap evolves: multi-year ice "area," which discards areas of open water among ice floes and focuses exclusively on the regions of the Arctic Ocean that are completely covered by multi-year ice. Sea ice area is always smaller than sea ice extent, and it gives scientists the information needed to estimate the total volume of ice in the Arctic Ocean. Comiso found that multi-year ice area is shrinking even faster than multi-year ice extent, by -17.2 percent per decade.

"The average thickness of the Arctic sea ice cover is declining because it is rapidly losing its thick component, the multi-year ice. At the same time, the surface temperature in the Arctic is going up, which results in a shorter ice-forming season," Comiso said. "It would take a persistent cold spell for most multi-year sea ice and other ice types to grow thick enough in the winter to survive the summer melt season and reverse the trend."

Scientists differentiate multi-year ice from both seasonal ice, which comes and goes each year, and "perennial" ice, defined as all ice that has survived at least one summer. In other words: all multi-year ice is perennial ice, but not all perennial ice is multi-year ice (it can also be second-year ice).

Comiso found that perennial ice extent is shrinking at a rate of -12.2 percent per decade, while its area is declining at a rate of -13.5 percent per decade. These numbers indicate that the thickest ice, multiyear-ice, is declining faster than the other perennial ice that surrounds it.

As perennial ice retreated in the last three decades, it opened up new areas of the Arctic Ocean that could then be covered by seasonal ice in the winter. A larger volume of younger ice meant that a larger portion of it made it through the summer and was available to form second-year ice. This is likely the reason why the perennial ice cover, which includes second year ice, is not declining as rapidly as the multiyear ice cover, Comiso said.

Multi-year sea ice hit its record minimum extent in the winter of 2008. That is when it was reduced to about 55 percent of its average extent since the late 1970s, when satellite measurements of the ice cap began. Multi-year sea ice then recovered slightly in the three following years, ultimately reaching an extent 34 percent larger than in 2008, but it dipped again in winter of 2012, to its second lowest extent ever.

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NASA’s Hubble Space Telescope discovers Black Hole surrounded by Star Cluster

Astronomers know how massive stars collapse to form black holes but it is not clear how supermassive black holes, which can weigh billions of times the mass of our sun, form in the cores of galaxies. One idea is that supermassive black holes may build up through the merger of smaller black holes.

Sean Farrell of the Sydney Institute for Astronomy in Australia discovered a middleweight black hole in 2009 using the European Space Agency’s XMM-Newton X-ray space telescope. Known as HLX-1 (Hyper-Luminous X-ray source 1), the black hole has an estimated weight of about 20,000 solar masses. It lies towards the edge of the galaxy ESO 243-49, 290 million light-years from Earth.

Farrell then observed HLX-1 simultaneously with NASA’s Swift observatory in X-ray and Hubble in near infrared, optical and ultraviolet wavelengths. The intensity and the color of the light may indicate the presence of a young, massive cluster of blue stars, perhaps 250-light-years across, encircling the black hole. Hubble can’t resolve the stars individually because the suspected cluster is too far away. The brightness and color is consistent with other clusters of stars seen in other galaxies, but some of the light may be coming from the gaseous disk around the black hole.

“Before this latest discovery, we suspected that intermediate-mass black holes could exist, but now we understand where they may have come from,” Farrell said. “The fact that there seems to be a very young cluster of stars indicates that the intermediate-mass black hole may have originated as the central black hole in a very-low-mass dwarf galaxy. The dwarf galaxy might then have been swallowed by the more massive galaxy, just as happens in our Milky Way.”

From the signature of the X-rays, Farrell’s team knew there would be some blue light emitted from the high temperature of the hot gas in the disk swirling around the black hole. They couldn’t account for the red light coming from the disk. It would have to be produced by a much cooler gas, and they concluded this would most likely come from stars.


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Infrared Sounder on NASA's Suomi NPP Starts its Mission

A powerful new infrared instrument, flying on NASA's newest polar-orbiting satellite, designed to give scientists more refined information about Earth's atmosphere and improve weather forecasts and our understanding of climate, has started sending its data back to Earth.

The Cross-track Infrared Sounder (CrIS) joins four other new instruments aboard the Suomi National Polar-orbiting Partnership (NPP) satellite, which NASA launched on Oct. 28, 2011 from Vandenberg Air Force Base in California. The Suomi NPP mission is the bridge between NOAA's Polar Operational Environmental Satellite (POES) and NASA's Earth Observing System satellites and the next-generation Joint Polar Satellite System (JPSS).

Since it reached orbit, Suomi NPP and its suite of five instruments are undergoing extensive checkouts before starting regular science observations. Suomi NPP is the result of a partnership between NASA, NOAA and the Department of Defense.

CrIS, an advanced spectrometer with 1,305 infrared spectral channels, is designed to provide high vertical resolution information on the atmosphere's three-dimensional structure of temperature and water vapor. The Atmospheric Infrared Sounder (AIRS) on the EOS Aqua mission, launched in 2002, demonstrated how useful this type of data could be for understanding the atmosphere. CrIS will continue this data record and provide data for use in NOAA's numerical weather prediction models to forecast severe weather days in advance.

"Significant overlap between AIRS and CrIS will provide the Earth science research community the ability to maintain the unprecedented accuracy and stability of the temperature and moisture data record initiated by AIRS," said Diane Wickland, Suomi NPP program scientist at NASA Headquarters.

"Having data from CrIS will only improve the quality, timeliness and accuracy of NOAA's weather and climate predictions, which directly affect everyone in America," said Mary Kicza, assistant administrator for NOAA's Satellite and Information Service (NESDIS).

"Over longer periods, data from CrIS will help NOAA to better understand climate phenomena such as El Niño and La Niña that impact global weather patterns," said Mitch Goldberg, NOAA's JPSS program scientist.

The Advanced Technology Microwave Sounder (ATMS), which measures temperature and humidity in both clear and cloudy conditions, was the first Suomi NPP instrument activated. ATMS and CrIS data together will be used operationally in weather forecasts beginning in the Spring of 2012.


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