Mars Mystery

 This story is getting plenty of buzz and apparently we will have to wait a couple of weeks for confirmation. The point is obviously that some folks are excited. Most likely we have an unambiguous methane signature.

Anyway it must be good news vis a vis the existence of biological life on Mars. Otherwise we are looking at rocks and minerals we know and understand or rocks and minerals we do not understand. Welcome to prospecting.

Curiosity has been very productive and I expect plenty more. This is a strongly disturbed area promising plenty of interesting geology.

Mars Mystery: Has Curiosity Rover Made Big Discovery?

by Mike Wall, SPACE.com Senior Writer

Date: 20 November 2012

http://www.space.com/18565-mars-rover-curiosity-discovery-mystery.html

NASA's Mars rover Curiosity has apparently made a discovery "for the history books," but we'll have to wait a few weeks to learn what the new Red Planet find may be, media reports suggest.

The discovery was made by Curiosity's Sample Analysis at Mars instrument, NPR reported today (Nov. 20). SAM is the rover's onboard chemistry lab, and it's capable of identifying organic compounds — the carbon-containing building blocks of life as we know it.

SAM apparently spotted something interesting in a soil sample Curiosity's huge robotic arm delivered to the instrument recently.

"This data is gonna be one for the history books," Curiosity chief scientist John Grotzinger, of Caltech in Pasadena, told NPR. "It's looking really good."

The rover team won't be ready to announce just what SAM found for several weeks, NPR reported, as scientists want to check and double-check the results. Indeed, Grotzinger confirmed to SPACE.com that the news will come out at the fall meeting of the American Geophysical Union, which takes place Dec. 3-7 in San Francisco. 

The $2.5 billion Curiosity rover landed inside Mars' huge Gale Crater on Aug. 5, kicking off a two-year mission to determine if Mars has ever been capable of supporting microbial life.

The car-size robot carries 10 different instruments to aid in its quest, but SAM is the rover's heart, taking up more than half of its science payload by weight.

In addition to analyzing soil samples, SAM also takes the measure of Red Planet air. Many scientists are keen to see if Curiosity detects any methane, which is produced by many lifeforms here on Earth. A SAM analysis of Curiosity's first few sniffs found no definitive trace of the gas in the Martian atmosphere, but the rover will keep looking.

Curiosity began driving again Friday (Nov. 16) after spending six weeks testing its soil-scooping gear at a site called "Rocknest." The rover will soon try out its rock-boring drill for the first time on the Red Planet, scientists have said.

Mars Mystery: Here’s What We Know

NASA says its Curiosity rover has made a discovery on Mars, but isn't saying more. Clues offer some educated guesses about what NASA's found.

By J. Nicholas Hoover  InformationWeek

November 21, 2012 12:10 PM

http://www.informationweek.com/government/information-management/mars-mystery-heres-what-we-know/240142491

Results of soil sample analysis by NASA's Curiosity rover may have yielded a significant scientific discovery on Mars, possibly of organic compounds, but until NASA makes a more detailed announcement at a conference in early December, the public will have to sift through available clues.

In the meantime, Curiosity will take a break over the Thanksgiving holiday, during which scientists will use the rover's camera to look for future routes and targets for investigation.

"This data is one for the history books," NASA Jet Propulsion Laboratory scientist John Grotzinger recently told National Public Radio, while adding that he could not divulge more until scientists had a better chance to vet the data. Hypotheses have ranged from a discovery of complex organic matter to chemicals indicating the presence of water.

According to Grotzinger, NASA's Sample Analysis at Mars (SAM) was the tool that facilitated the discovery. SAM is a hypersensitive set of three instruments -- a quadrupole mass spectrometer, a gas chromatograph and a tunable laser spectrometer -- that process and analyze soil samples in search of compounds containing carbon and other elements associated with life.

SAM is the largest tool on Curiosity, weighing in at 88 pounds. The tool's mass spectrometer separates compounds and elements by mass to help scientists identify them, while the chromatograph vaporizes samples and analyzes the resulting gasses, and the laser spectrometer measures isotopes of carbon, hydrogen and oxygen in gasses.

"Because these compounds are essential to life as we know it, their relative abundances will be an essential piece of information for evaluating whether Mars could have supported life in the past or present," NASA says in an online description of SAM's mission online.

NASA sent SAM to Mars with five specific goals, all of which aim to address questions about habitability on Mars. These goals include surveying carbon sources on Mars, searching for organic compounds, revealing the state of isotopes on Mars that are important for life as we know it on Earth, determining Mars' atmospheric composition and measuring other gases in order to "better constrain models of atmospheric and climatic evolution."

Curiosity recently spent six weeks testing its soil sampling tools at a sand dune that NASA named Rocknest. The $2.5 billion Curiosity is on a broader two-year mission to investigate Mars' present or past habitability after landing in August in the Red Planet's Gale Crater -- a site that, according to NASA analysis of satellite imagery, was historically covered with water.

NASA first used SAM's soil sample tool with soil from Rocknest on November 9, and followed that sampling with two days of analysis on the sample. In a statement issued November 13, SAM principal investigator Paul Mahaffy indicated that the sample yielded "good data," but did not tip his hand as to what that data portended.

While the discovery of organic compounds would be significant, as previous missions have not found them on Mars, NASA officials have previously said in interviews that they expect that Curiosity would find organic materials. The presence of organics would not necessarily indicate past or present presence of life on Mars: For example, organics can be found on meteorites, and methane can be produced by abiotic processes.

NASA plans to announce the news at the fall meeting of the American Geophysical Union, which takes place December 3 to 7 in San Francisco. NASA scientists have already used SAM to analyze Mars' atmosphere, finding little evidence of methane in the atmosphere despite an earlier false alarm.

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