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Unformatted text preview: iological, reaction! Surface is strongly oxidizing (UV)!
⇒!Organic matter would be destroyed!
⇒ Experiments not designed for this!
⇒ Oxygen rich compounds on surface can react like life!
To ﬁnd current Martians (or fossil Martians)…. !
And remember that your experiments determine what
you can ﬁnd…!
! More Recent Mars Missions!
• Pathﬁnder/Sojourner 1997!
Global Surveyor 1998!
Mars Odyssey 2002!
Mars Express (ESA) 2003!
– Beagle crashed (life detection)!
• Mars Rovers 2004!
– Spirit and Opportunity!
• Phoenix (NASA) landed in 2008!
• Curiosity Rover landed in 2012! Global Surveyor!
Mars Global Surveyor!
1998 - in orbit around Mars!
The “Face” on Mars gets erased! !
Viking ! And with Mars Odyssey! Surveyor! Global Surveyor Results!
Located areas of ﬂoods within last few million!
years (few impact craters)!
Apparently from underground!
Out through volcanic ﬁssures!
Like a geyser - suspect large aquifer a couple of !
miles below surface!
Or maybe snow !
!(Feb. 2003) !
!Mars Odyssey Website! Mars Odyssey Results!
Mapping from Orbit!
Gamma ray spectrometer!
Cosmic rays excite nuclei on surface !
to emit Gamma rays! !
Wavelength of gamma rays characteristic of element!
Also neutron detector!
Can detect hydrogen (stand in for H2O) in top meter!
Evidence indicates substantial H2O near poles! Mars Odyssey ! 2001 Mars Odyssey Water Map! Mars Odyssey ! Mars Express!
• Walls of Candor Chasma!
Part of Valles Marineris!
Appears to be erosion!
Liquid water?! Mars Express!
• Branching channels!
• More evidence of
water?! Mars Rovers!
• Two Landers (Spirit and Opportunity)!
Both rovers that have explored 5 to 10 km!
Can dust rock, drill into...
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This note was uploaded on 04/05/2013 for the course UGS 302 taught by Professor Staff during the Spring '08 term at University of Texas.
- Spring '08