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Mars Exploration Rovers and Mars

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Mars Exploration Rovers and Mars Evidence for Liquid Water on Mars (in remote past) Valley networks Outflow channels Northern Ocean Controversial suggestion ... – PowerPoint PPT presentation

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Title: Mars Exploration Rovers and Mars


1
Mars Exploration Rovers and Mars
2
Evidence for Liquid Water on Mars (in remote past)
  • Valley networks
  • Outflow channels
  • Northern Ocean

3
Controversial suggestion northern Mars ocean is
an ancient seabed
4
And the Face on Mars prove ancient aliens were
on Mars
5
Mineralogy Key to hydrological history of Mars
  • Magnetite Fe3O4
  • Hematite Fe2O3
  • Olivine Fe2SiO4
  • Pyroxine CaFeSi2O6

Minerals tell about hydrological history, what
chemical reactions were occurring
6
Landing Sites for Spirit and Opportunity
  • Spirit Gusev crater, crater with water flows
  • Opportunity Meridianum Plani reflectance
    spectra of hematite

7
Gusev Crater A Noachian Site with Evidence of
Flowing Water
8
Spirit on Mars
9
Opportunity LandingBedrock
10
Rocks at Opportunity Landing Site Show Evidence
of Water
11
Opportunity at Endurance Craterold bedrock
formations
12
More Mossbauer spectra from Mars
13
Results from MER spacecraft
  • Evidence of water at Meridiani from the outset
    haematite chondrules, sedimentary rocks with
    chemically weathered compositions there are
    other possible scenarios they all require liquid
    water and acidic conditions.
  • Early results from Gusev seemed to argue against
    water high abundance of pristine olivine. the
    ubiquitous presence of olivine in the soil
    suggests that physical rather than chemical
    weathering processes

14
Recent results from MER (cont)
  • More recent results from Gusev, coatings on rock
    with 2-5 times high S Cl concentrations than
    interior, crystalline haematite.
  • The physical and chemical characteristics
    provide evidence for limited by unequivocal
    interaction between water and the volcanic rocks
    of the Gusev plains

15
Current status of results from surface of Mars.
There probably was standing water on the surface
of Mars for extended periods of time in the
Noachian period. The highly acidity of the water
apparently generated sulfur-dominated chemistry
rather than carbonate-dominated chemistry. Time
(and future missions) will tell. Stay tuned.
16
The Jovian planetswhere are they?
17
Expanding the scalethe domain of the Jovian
planets
18
Sizes of the Jovian planets
19
What do they look like? -Jupiter
Band structures visible in small telescopes
20
Jupiter closeup of cloud structures
21
Saturn
Cloud bands and the ring
22
Saturn up closeatmosphere and rings
Picture from the Cassini spacecraftmore about
the ring later
23
The atmosphere of Saturn
Also evidence of cloud bands. We see the top of
the atmospherebut what kind of atmosphere?
24
The spectrum of Jupiterclue to its composition
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