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Space

Nearby, Recent Interplanetary Collision Inferred 88

The Bad Astronomer writes about a new discovery by the Spitzer Space Telescope, which detected signs of an interplanetary smashup only 100 light-years from here, and only a few thousand years ago. There's a NASA-produced animation of the collision between a Mercury-sized planet and a moon-sized impactor. The collision's aftermath was detected by the presence of what are essentially glass shards in orbit around the star. Here's NASA's writeup.

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Ocean: A body of water occupying about two-thirds of a world made for man -- who has no gills. -- Ambrose Bierce

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