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Most distant supernova yet seen.

Most distant supernova yet seen

About 5 billion years ago, a star exploded into a supernova bright enough to be seen from Earth (5 billion light-years away) for barely a month. Fortunately, Danish astronomer Hans Ulrik Norgaard-Nielsen happened to be studying that part of the sky with te Danish 1.5-meter telescope at the European Southern Observatory in Chile when the supernova's light reached Earth this summer.

The star, the most distant supernova yet detected, is part of a galaxy in a cluster known as AC118, and would not have been recognizable by itself had it not blown up. It was detected by Norgaard-Nielson on Aug. 9, possibly less than a week after the brightening due to its explosion first reached Earth. Spectral measurements were hastily made, and by Sept. 6 the supernova had already faded to a point too faint to see.
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Publication:Science News
Date:Oct 1, 1988
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