ScienceDaily: Cosmic Rays News |
| Evidence of jet in Milky Way's black hole Posted: 20 Nov 2013 04:24 PM PST Astronomers have long sought strong evidence that Sagittarius A*, the supermassive black hole at the center of the Milky Way, is producing a jet of high-energy particles. Finally they have found it. |
| Rediscovered Apollo data gives first measure of how fast moon dust piles up Posted: 20 Nov 2013 11:38 AM PST Scientists used rediscovered Apollo data to make the first determination of how fast lunar dust accumulates. It builds up unbelievably slowly by the standards of any Earth-bound housekeeper -- just fast enough to form a layer about a millimeter (0.04 inches) thick every 1,000 years. Yet, that rate is 10 times previous estimates. It's also speedy enough to pose a serious problem for the solar cells that serve as critical power sources for space exploration missions. |
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