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Chris Mckay at Stanford 2012


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Chris McKay (NASA) at the SMMMASH 2012

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Chris Mckay at Stanford 2012

  1. 1. Space: Should we go? Or should we stay? 18 Oct
  2. 2. The search for a second genesis of life⇒ comparative biochemistry (life 2.0)⇒ life is common in the universe (yeah!) Aliens: not on our tree of life"The Tree of Life"defines Earth Life
  3. 3. Where to look for life? Mars: past liquid water, no/yes on organics, consumes organicsIncreasingchance of lifenot related toEarth life Europa: has ocean, possibly organics Enceladus: has icy jet, liquid water, organics, nitrogen Titan: liquid - not water, organics
  4. 4. The current mission to Mars:Mars Science Laboratory: CuriosityLaunched: Nov. 2011Landed: 5 Aug 2012
  5. 5. MSL photographed by MRO as it landsCuriosity on parachute, imaged byHiRISE on the Mars Reconnaissance Orbiter
  6. 6. Heat Shield dropping off during descent phase.Photographed byshield separation captured Heat the descent cameras by Curiosity’s Mars Descent Imager
  7. 7. Skycrane landing kicks up a little dust. Kicking up dust just prior to landing
  8. 8. NASA/JPL Navigation camera image showing the surface scour marks and rocks on the rover’s deck
  9. 9. Curiosity and itstracks byHiRISE on the The long winding roadMarsReconnaissanceOrbiter
  10. 10. Mastcam-100 image of Mount Sharp’s layers,canyons and buttes This boulder is the size of CuriosityNASA/JPL/MSSS
  11. 11. NASA/JPL/MSSSThe conglomerate “Link” with associatedloose, rounded pebbles
  12. 12. There is a pyrolysis GCMS as part of the SAM instrument on MSL Sample Analysis for MarsThree modes which could detect organics despite the perchlorate1. Combustion with O2 to CO22. Liquid extraction, SAM will wash the samples with two derivatization agents: tetramethylammonium hydroxide & N-Methyl-N-(Tert-Butyldimethylsilyl) trifluoroacetamide3. Head space monitoring during pyrolysis
  13. 13. Two sources of non-biological organic materials: Meteorites and Miller-Urey synthesis experiments How do they differ from life? Two sources of non-biological organic materials:Two sources of non-biological organicmaterials: Life Miller-Urey Experiments
  14. 14. Human exploration
  15. 15. this slide intentionally left banke