Mars Soil Sample Delivered
The rover’s Chemistry and Mineralogy (CheMin) instrument is analyzing this sample to determine what minerals it contains.
Credit: NASA/JPL-Caltech
“We are crossing a significant threshold for this mission by using CheMin on its first sample,” said Curiosity’s project scientist, John Grotzinger of the California Institute of Technology in Pasadena. “This instrument gives us a more definitive mineral-identifying method than ever before used on Mars: X-ray diffraction. Confidently identifying minerals is important because minerals record the environmental conditions under which they form.”
The previous day, the rover shook the scooped material inside sample-processing chambers to scrub internal surfaces of any residue carried from Earth. One earlier scoopful was also used for cleaning. Additional repetitions of this cleaning method will be used before delivery of a future sample to the rover’s other internal analytic instrument, the Sample Analysis at Mars investigation, which studies samples’ chemistry.
This image shows part of the small pit or bite created when NASA’s Mars rover Curiosity collected its second scoop of Martian soil at a sandy patch called “Rocknest.” The bright particle near the center of this image, and similar ones elsewhere in the pit, prompted concern because a small, light-toned shred of debris from the spacecraft had been observed previously nearby (PIA16230). However, the mission’s science team assessed the bright particles in this scooped pit to be native Martian material rather than spacecraft debris.
Credit: Image credit: NASA/JPL-Caltech/MSSS
This image was taken by the Mars Hand Lens Imager (MAHLI) camera on Curiosity’s arm during the 69th Martian day, or sol, of the mission (Oct. 15, 2012), about a week after the scoop dug this hole. The view here covers an area of ground about 1.6 inches (4 centimeters) across.
Various small bits of light-toned material on the ground at Rocknest have affected the rover’s activities in the past several days. One piece about half an inch (1.3 centimeters) long was noticed on Oct. 7. The rover team postponed use of the robotic arm for two days while investigating this object, and assessed it to be debris from the spacecraft.
Images taken after Curiosity collected its second scoop of Rocknest material on Oct. 12 showed smaller bits of light-toned material in the hole dug by the scooping action. This led to discarding that scoopful rather than using it to scrub the processing mechanisms. Scientists assess these smaller, bright particles to be native Martian material, not from the spacecraft.
“We plan to learn more both about the spacecraft material and about the smaller, bright particles,” said Curiosity Project Manager Richard Cook of NASA’s Jet Propulsion Laboratory, Pasadena. “We will finish determining whether the spacecraft material warrants concern during future operations. The native Mars particles become fodder for the mission’s scientific studies.”
During a two-year prime mission, researchers are using Curiosity’s 10 instruments to assess whether the study area has ever offered environmental conditions favorable for microbial life. JPL, a division of Caltech, manages the project and built Curiosity. For more about Curiosity, visit: http://www.nasa.gov/msland http://mars.jpl.nasa.gov/msl .
Contacts and sources:
Guy Webster
Jet Propulsion Laboratory, Pasadena, Calif.
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