Mars Rover: Curiosity
welcome
NASA invites you to be part of our Mars team. This moment is the spark to a raging fire that's about to ignite if you choose to accept this offer. You and the others you see sitting around you have all been carefully selected from universities across America. Each and every person in this room has a mind ike no other, making the potential endless.
The tasks we ask of you, include technologically advancing our journey on Mars, conducting research based upon the findings of Curiosity, and developing ever changing possibilties of the cultivation on Mars.
“Curiosity, the most sophisticated rover ever built, is now on the surface of the Red Planet, where it will seek to answer age-old questions about whether life ever existed on Mars; or if the planet can sustain life in the future.� Charles Bolden NASA administrator
I
t Wasn’t Expected
but it was
Interesting
It looked to be uniformly bland, which is why scientists chose it as the first rock to be examined up close last year by the Mars rover Curiosity: a run-of-themill volcanic rock, something to test and calibrate the rover’s instruments. The rock turned out to be anything but ordinary, scientists reported last week. It is unlike any Mars rock previously examined and more like an Earth rock. And as for the pile of windblown dust and
soil that the rover spent weeks analyzing? It was not dry as dust, but contained water. Such are the surprises that turn out to be a near constant of Mars exploration, according to six new papers on the red planet that appeared last week — five in the journal Science and one in The Journal of Geophysical Research: Planets. The new findings are “the nuts and bolts”
of what Curiosity has discovered so far, said John P. Grotzinger, the mission’s project scientist. On Sept. 19, another paper from the science team reported that Curiosity had not detected any methane, which could have been a sign of present-day microbes. The mission is designed to see whether the building blocks of life existed on Mars, especially in the distant past, but includes no experiments to directly detect life. In September last year, Curiosity rolled up to the volcanic rock, a pyramidshaped chunk about the size of a football. The science team named it Jake M after Jacob R. Matijevic, a longtime NASA rover engineer who had died the month before. It appeared to be a chunk of basalt, like many others strewed on the Martian surface. “Just featureless,” said Edward M. Stolper, a professor of geology at the California Institute of Technology and the
lead author of one of the Science papers. “It wasn’t expected to be interesting.” Then the first readings came back. The mix of elements was different from that of other Martian basalts. “It just didn’t look like any of the other guys,” Dr. Stolper said. “I could tell that this was an unusual rock type and that it had characteristics that reminded me of certain kinds of terrestrial rocks.” The rock was alkaline, similar to a wellknown but uncommon type of rock called mugearite, which is found on volcanic islands like Hawaii. “People say that less than 1 percent of the rocks on Earth are alkaline,” Dr. Stolper said. “If you plopped down on Earth, you wouldn’t find something like this likely randomly.” On Earth, the hot magma that often hardens into alkaline rocks comes from the melting of rocks deep in the mantle in the presence of water. That suggests that the
movement of magma and other geological processes within Mars may have been more complex and interesting than has been thought. “People say, ‘Sure, why not?’ but we haven’t seen it before,” Dr. Stolper said of the composition of Jake M. “It’s not a little bit different. It’s a lot different.” In October, Curiosity visited the dirt pile — a stationary Martian dune piled up by gale-force winds 50,000 to 200,000 years old — and performed the first soil test in its chemistry laboratory, which is packed into a space the size of a micro-wave oven. The fine dust in the pile, which was named Rocknest, was expected to be a mix of what is blowing around the entire planet. “It looks pretty similar everywhere we go,” said Laurie A. Leshin, a professor of earth sciences and environmental sciences at Rensselaer Polytechnic Institute and the lead author of another of the Science papers.
When the dirt was scooped into the lab and heated, it released water vapor. Other analysis showed that the dirt and dust consisted of both tiny crystals where the atoms lined up in neat patterns and what the scientists called “amorphous” materials — the atoms jumbled up randomly, as in glass. There was no evidence of water in the crystallized minerals, so all of the water 2 percent by weight was chemically bound up in the glassy particles. “It’s actually a fair amount,” Dr. Leshin said. “We always think of Mars as being this dry desert planet.” The water in the dust could be a resource for future astronauts. Heating up a cubic foot of dirt would yield a couple of pints of water, Dr. Leshin said. Dr. Grotzinger, the project scientist, said the water could also conceivably be something for hypothetical Martian microbes to drink, although Curiosity has yet to find any
of the molecules necessary for carbon-based life. Possibly complicating life for human visitors, Curiosity also found that the chemicals called perchlorates, which can cause thyroid problems, are prevalent at the landing site. An earlier NASA mission, Phoenix Mars, had found perchlorates near the north pole. “It’s suggesting perhaps a global distribution of these salts,” said Daniel P. Glavin, an astrobiologist at NASA’s
Ames Research Laboratory and the lead author of the paper that reported the perchlorate findings. The perchlorates also complicate Curiosity’s search for the carbon-based molecules known as organics that could be the building blocks for life, past or present. Heated in the presence of perchlorates, organic molecules disintegrate into simple carbon dioxide.
“The mission is designed to see whether the building blocks of life existed on mars, especially in the distant past, but it includes no experiments to directly detect life.�
Mars Rover: Curiosity
update A NASA Mars Curiosity rover team member gives an update on developments and status of the planetary exploration mission. The Mars Science Laboratory spacecraft delivered Curiosity to its target area on Mars at 1:31:45 a.m. EDT on Aug. 6, 2012 which includes the 13.8 minutes needed for confirmation of the touchdown to be radioed to Earth at the speed of light.The rover will conduct a nearly two-year prime mission to investigate whether the Gale Crater region of Mars ever offered conditions favorable for microbial life. Curiosity carries ten science instruments with a total mass 15 times as large as the science payloads on NASA’s Mars rovers Spirit and Opportunity. Some of the tools, such as a laser-firing instrument for checking rocks’ elemental composition from a distance, are the first of their kind on Mars. Curiosity will use a drill and scoop, which are located at the end of its robotic arm, to gather soil & powdered samples of rock interiors, then sieve and parcel out these samples into the rover’s analytical laboratory instruments.
TH A NK YOU we hope you accept the offer to become part of our team.