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Slideshow: 01
2001 Mars Odyssey Slides |
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13) ASTER infrared image (copyright also: U.S./Japan ASTER Science Team):
How does THEMIS work to identify minerals? Every mineral has its own
characteristic light signature-but sometimes the light given off is not
visible to the human eye. THEMIS will study infrared (heat)
emissions, which fall just outside of visible spectrum.
Variations in the thermal infrared "color" are due to
differences in the kinds of minerals that make up rocks and soil.
ASTER, an Earth orbiting instrument on the Terra spacecraft, has
used a similar approach to map the distribution of minerals here
on Earth. |
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