Ron Cowen
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All Stories by Ron Cowen
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Space
Solar system’s edge surprises astronomers
New observations reveal a dense ribbon structure that current models don't explain.
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Space
Europa’s proposed ocean could be rich in oxygen
A proposed ocean on Jupiter’s moon Europa may receive about 100 times more oxygen than previously estimated.
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Space
Moon crash delivers no obvious plume
But the two impacts still yield data that could help in search for water
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Space
Ice confirmed on an asteroid
Reporting from the American Astronomical Society meeting in Puerto Rico, planetary scientists confirm, for the first time, the presence of frozen water on an asteroid.
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Space
Jupiter’s second greatest hit
Features of a bruise in the Jovian atmosphere suggest an asteroid may be what pummeled the planet this summer.
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Space
Largest known planetary ring discovered
Researchers have found a dusty band that circles Saturn and has a radius of more than 12 million kilometers.
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Space
Water on the moon: How much?
Ron Cowen reports from the annual meeting of the American Astronomical Society’s Division for Planetary Sciences.
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Space
Inspecting an asteroid that hit Earth
Researchers have analyzed fragments from 2008 TC3, the first asteroid ever tracked during its descent.
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Space
Universe has more entropy than thought
New calculations suggest that the cosmos is more disorderly than thought and is a bit closer to heat death.
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Astronomy
MESSENGER captures new images of Mercury during a third passage
MESSENGER flew past Mercury for a third time on September 29. The spacecraft's mission will continue, with MESSENGER due to settle into a yearlong orbit around Mercury in March 2011.
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Space
Windows on the Universe
Astronomy’s multiwavelength revolution paints a more complete picture of the cosmos