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Comet dust in the Helix Nebula
February 13, 2007
A bunch of rowdy comets are colliding and kicking up dust around a dead star, according to new observations from NASA's Spitzer Space Telescope. The dead star lies at the center of the much-photographed Helix nebula, a shimmering cloud of gas with an eerie resemblance to a giant eye.
"We were surprised to see so much dust around this star," said Kate Su of the University of Arizona, Tucson, lead author of a paper on the results appearing in the March 1 issue of Astrophysical Journal Letters. "The dust must be coming from comets that survived the death of their Sun."
Pluto-bound Craft Nears Jupiter
January 24, 2007
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, Feb 15 2007, 2:31 AM EST
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