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Monthly Archives: December 2012
Mars’ explosive childhood
Mars is widely understood to be a volcanic planet — its surface shows abundant evidence of volcanic activity, both ancient and more recent. Spacecraft detect lava flows in many locations, and spectroscopic evidence of volcanic rocks lies almost everywhere. The … Continue reading
Posted in Reports
Tagged climate, Coprates Chasma, early Mars, magnetic field, Mars Odyssey, THEMIS, thermal inertia, Valles Marineris, volcanism, volcanos
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Not-so-everlasting hills
When the Mars Exploration Rover Spirit reached the top of Husband Hill in the Columbia Hills of Gusev Crater on August 22, 2005, it stood 107 meters (351 feet) above its landing site. Yet if recent work is right, the … Continue reading
Posted in Reports
Tagged Columbia Hills, Gusev Crater, HiRISE, Husband Hill, Mars Exploration Rovers, MER, Navcam, Pancam, Spirit
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Loess in the lowlands
A team of geologists led by James A. Skinner, Jr. (U.S. Geological Survey) has discovered and mapped a previously unidentified unit in the Martian northern lowlands. The unit appears to give evidence of a major climate shift long ago in … Continue reading
Posted in Reports
Tagged atmosphere, climate change, CO2 ice, CTX, loess, MOLA, north polar ice cap, northern plains, THEMIS
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Caverns in the northern lowlands?
Vast quantities of water have poured across the surface of Mars in ages past. The evidence is obvious in dozens of outflow channels, large and small. The waters emerged, scientists think, from subsurface reservoirs when the frozen ground capping them … Continue reading
Posted in Reports
Tagged caverns, CTX, groundwater, Mars Odyssey, Mars Reconnaissance Orbiter, MOLA, THEMIS, water
1 Comment