Supernova Explosion on Replay Thanks to 'Einstein Cross,' Dark Matter Also Explored

March 5, 2015 7:04 PM

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An explosion from a distant supernova can be watched multiple times, due to a natural lens created by a bending galaxy. This gravitational lens is unique in that it allows for four separate images, instead of one or two.

The sky is full of magnifying glasses that act as natural telescope lenses, allowing distant objects, normally too faint for even the most powerful telescopes, to be studied. An astronomer from the University of California, Berkeley, along with data from the Hubble Space Telescope (HST) and the Keck...

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