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Monthly Archives: June 2011
How often does Mars get whacked?
Or — to pose this question more usefully — what’s the rate of crater-making impacts on Mars as compared to, say, the Moon? Why the Moon? Because it’s the one extraterrestrial body for which scientists have both a long visible … Continue reading
Posted in Reports
Tagged asteroid belt, asteroids, cratering rate, craters, dating, impacts, meteorites, Moon, Moon-Mars cratering scaling factor
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Peeking into a stacked deck
No one is planning to send a Mars rover into the high latitudes (north or south) anytime soon, but if a paper in Icarus (June 2011) by Seth J. Kadish and James W. Head (both Brown University) is correct, scientists … Continue reading
Posted in Reports
Tagged climate change, craters, dust, ice, impacts, pedestal craters, polar layered deposits
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Why is Mars so small?
Because it was starved during infancy, says Kevin Walsh (Observatoire de la Cote d’Azur and Southwest Research Institute, Boulder). In a paper in Nature, written with four colleagues and published June 5, 2011, he argues that when the planets were … Continue reading
Posted in Reports
Tagged asteroid belt, gas-giant planets, inner planets, Jupiter, Neptune, pre-planetary debris, protoplanetary disk, Saturn, terrestrial planets, Uranus
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Hunting for young lava flows
The quest to find the youngest, most recent lava flows on Mars inevitably leads back to two highly volcanic regions: Elysium and especially Tharsis. A group of researchers led by Ernst Hauber (DLR, Berlin) has zeroed in on Tharsis. Ignoring … Continue reading
Posted in Reports
Tagged CTX, lava flows, Mars Reconnaissance Orbiter, Tharsis, volcanos
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