Atom & Cosmos

The gassy halo engulfing the Milky Way, a comet in the neighborhood, and extraterrestrial rocks as the source of life on Earth

By Science News, 17:56 PM September 28, 2012

Huge halo may hold missing matter
The Milky Way galaxy is cocooned inside an enormous cloud of hot gas, a finding that could solve a persistent astrophysical conundrum. Heated to more than 1 million degrees Celsius, the halo extends more than 300,000 light-years from the galactic center and contains at least as much mass as 10 billion suns, scientists report in the Sept. 1 Astrophysical Journal Letters. An international team of astronomers used NASA’s orbiting Chandra X-ray Observatory to ...

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