Results 261 to 270 of about 77,251 (278)
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Science, 2001
Memoirs A Twentieth-Century Journey in Science and Politics. Edward Teller with Judy Shoolery. Perseus, Cambridge, MA, 2001. 640 pp. $35, C$52.95. ISBN 0-7382-0532-X. One of the most influential and most controversial scientists of the just-concluded century offers a personal perspective on his life, his ...
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Memoirs A Twentieth-Century Journey in Science and Politics. Edward Teller with Judy Shoolery. Perseus, Cambridge, MA, 2001. 640 pp. $35, C$52.95. ISBN 0-7382-0532-X. One of the most influential and most controversial scientists of the just-concluded century offers a personal perspective on his life, his ...
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No ‘nanofossils’ in martian meteorite
Nature, 1997Elongated, segmented forms found on fracture surfaces within the martian meteorite ALH84001 have been proposed to be martian ‘nanofossils’1, even though they appear too small to be fossilized bacteria2,3,4. We have examined similar forms and find that the majority are (non-biological) lamellar growth steps on pyroxene and carbonate crystals.
Hojatollah Vali +5 more
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Physics of the Earth and Planetary Interiors, 1991
Abstract Mars has a well-conducting core composed of a mixture of iron and sulphur. It is probably liquid and differentially rotating. The main problem is whether the core is stably stratified or convective. About 10–15% of sulphur is enough to drive a compositional convection over a great part of Martian evolution if an inner solid solid core was ...
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Abstract Mars has a well-conducting core composed of a mixture of iron and sulphur. It is probably liquid and differentially rotating. The main problem is whether the core is stably stratified or convective. About 10–15% of sulphur is enough to drive a compositional convection over a great part of Martian evolution if an inner solid solid core was ...
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2012
Phobos and Deimos, the two satellites of Mars, are potato-shaped city-sized lumps of rock orbiting in near-circular paths almost directly above the Martian equator. Both moons are made of very dark material and display cratering. Because of their low surface brightness and composition it was once widely considered that both Phobos and Deimos were ...
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Phobos and Deimos, the two satellites of Mars, are potato-shaped city-sized lumps of rock orbiting in near-circular paths almost directly above the Martian equator. Both moons are made of very dark material and display cratering. Because of their low surface brightness and composition it was once widely considered that both Phobos and Deimos were ...
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Monthly Review, 1997
Review of Red Mars, Green Mars, and Blue Mars by Kim Stanley Robinson. This article can also be found at the Monthly Review website , where most recent articles are published in full. Click here to purchase a PDF version of this article at the Monthly Review website.
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Review of Red Mars, Green Mars, and Blue Mars by Kim Stanley Robinson. This article can also be found at the Monthly Review website , where most recent articles are published in full. Click here to purchase a PDF version of this article at the Monthly Review website.
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2013
The year is 2035, and the crew from the first expedition to Mars is returning to Earth. The crewmembers are anxious to get home, and ennui pervades the ship. The mood is broken by a series of mysterious events that jeopardize their safety. Someone or something is threatening the crew. Is it an alien being? A psychotic crewmember?
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The year is 2035, and the crew from the first expedition to Mars is returning to Earth. The crewmembers are anxious to get home, and ennui pervades the ship. The mood is broken by a series of mysterious events that jeopardize their safety. Someone or something is threatening the crew. Is it an alien being? A psychotic crewmember?
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2006
Aurora have been observed for the first time (in 2004) at Mars by the UV spectrograph SPICAM aboard Mars Express. This result was published in Bertaux et al. (Nature, 435,790,2005). What was observed is a significant increase of the signal for 7 seconds. The spectrum contains some features typical of a dayside spectrum: CO2+ and CO bands and O line. In
Witasse, Olivier +8 more
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Aurora have been observed for the first time (in 2004) at Mars by the UV spectrograph SPICAM aboard Mars Express. This result was published in Bertaux et al. (Nature, 435,790,2005). What was observed is a significant increase of the signal for 7 seconds. The spectrum contains some features typical of a dayside spectrum: CO2+ and CO bands and O line. In
Witasse, Olivier +8 more
openaire +1 more source