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|More Evidence for Glaciers|
Mars Express's High Resolution Stereo Camera (HRSC) has
returned 3D images that are at an incredible resolution of 50m and that
have revealed important new evidence for glaciers on Mars. The images
allow geologists to have a
better picture of how the surface evolved over time. "The images are
showing us a lot more evidence for recent water activity, and probably
recent ice deposits, than I'd previously thought," says John Murray,
one of the HRSC team members at Open University, Milton Keynes, UK.
Features that are similar to Earth's glacier-formed U-shaped valleys
with rubble in
them have been found on the Red Planet. The images also show that the
canyon floors are covered in
a dark, layered material, suggesting past volcanic activity.
|Tithonium Chasma, looking east. The chasma is part of the Valles Marineris canyon system.|
On a side note, a powerful instrument on the Mars Express, the Mars Advanced
Radar for Subsurface and Ionosphere Sounding (MARSIS) that could find
water within a few kilometers below the surface, is still inactive.
Activating this device would mean that the orbiter would need to turn.
Simulations are being done to make sure this is safe for the craft.
(More info: Nature)
- posted by Jim @ 20:41 EST