NASA’s Exploration Plan: “Follow the Water” GEOLOGY LIFE CLIMATE Prepare for Human Exploration...

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Transcript of NASA’s Exploration Plan: “Follow the Water” GEOLOGY LIFE CLIMATE Prepare for Human Exploration...

NASA’s Exploration Plan: “Follow the Water”

GEOLOGYGEOLOGY

LIFELIFE

CLIMATECLIMATE

Prepare for Human Exploration

Prepare for Human Exploration

When • Where • Form • Amount

WATER

NASA’s Strategy for Mars Exploration

Mars Global Surveyor (1997-2006)

Global topography (elevation)

discovery of recent water-carved gullies

First orbiter around Mars since Viking (mid-1970’s)

Recently lost after 10 years of successful operations.

Science Package

1997 Mars Global Surveyor (MGS)

• Mars Orbiter Laser Altimeter (MOLA)– Global 500 m resolution grid with < 1 m

vertical resolution

• Mars Orbiter Camera (MOC)– Few-meter resolution camera– more than 120,000 released images

• Thermal Emission Spectrometer– Near-Infrared broadband spectrometer

• rock, ice, and atmosphere compositions• thermal structure of the Martian surface

Pre-MGS Global Topography

MGS Topography

2011 Mars Science Laboratory

2011 MSL Key Goals

• Characterize a site that:

– was a habitable environment.• What does this mean?

– is likely to have preserved biosignatures.

– can be related to the “Big Picture”.

Let’s watch it now!

2009 Mars Science Laboratory

Keeping in Mind the Key MSL Goals…

• Characterize a site that:

– was a habitable environment.• What does this mean?

– is likely to have preserved biosignatures.

– can be related to the “Big Picture”.

VL1MPF

MER-B

VL2

MER-A

2007 Phoenix

Where would you land a $2.3B spacecraft?

But how can we assess the engineering and safety of the

landing sites??

GIS to the rescue!

Four Finalist Candidate Landing Sites

Eberswalde Crater (24°S, 327°E, -1.5 km) contains a clay-bearing delta formed when an ancient river deposited sediment, possibly into a lake.

Gale Crater (4.5°S, 137°E, -4.5 km) contains a 5-km sequence of layers that vary from clay-rich materials near the bottom to sulfates at higher elevation.

Mawrth Vallis (24°N, 341°E, -2.2 km) exposes layers within Mars’ surface with differing mineralogy, including at least two kinds of clays.

Holden Crater (26°S, 325°E, -1.9 km) has alluvial fans, flood deposits, possible lake beds, and clay-rich sediment.