Geophysical Research Letters

Asteroid's troughs suggest stunted planet

(Phys.org)—Enormous troughs that reach across the asteroid Vesta may actually be stretch marks that hint of a complexity beyond most asteroids. Scientists have been trying to determine the origin of these ...

dateSep 26, 2012 in Space Exploration
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A new state of Venus's ionosphere

Observations from NASA's Pioneer Venus orbiter, which reached Venus in 1978, suggested that Venus's ionosphere had two states: a magnetized state with a large- scale horizontal magnetic field and an unmagnetized ...

dateDec 27, 2012 in Space Exploration
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When the world ended in ice

(Phys.org) -- A mile or so of glacial ice covering much of North America and plowing down from the north once terminated in the New York metropolitan area, at a front stretching roughly from exit ...

dateJul 03, 2012 in Earth Sciences
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