NASA's
Phoenix Mars Lander scraped up some icy soil to analyze in its instruments,
NASA announced on Tuesday.
On
Saturday, the lander's 33rd Martian day, or sol, on the red planet, Phoenix
enlarged the "Snow White" trench in the so-called Wonderland area.
Two days earlier, the spacecraft dug down
to the hard icy layer beneath the subsurface dirt with its robotic arm.
It then
used the rasp on the scoop at the end of the arm to make 50 scrapes in the ice
and then heaped the scrapings into little piles each with about two to four
teaspoonfuls of ice. The scraping created a grid in the icy layer about 0.08
inches (2 millimeters) deep.
On Sunday,
mission scientists used the craft's Surface Stereo Imager to view
the scrapings and agreed that they were ideal representatives of the
boundary between dirt and ice.
Mission controllers commanded the
spacecraft to scoop up some of the scrapings for analysis in the lander's
instruments. Phoenix will first sprinkle some of the material into the Thermal
and Evolved-Gas Analyzer (TEGA), which bakes surface samples and analyzes their
composition. TEGA is especially sensitive to the signature of water and can
determine the melting point of ice.
By
analyzing these samples from the Martian surface, scientists hope to determine
whether the water ice near the planet's north pole may once of have been
liquid, possibly creating a habitable zone for Martian microbial life.
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