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News Release Archive:

News Release 578 of 966

April 2, 2001 01:00 PM (EDT)

News Release Number: STScI-2001-09

Blast from the Past: Farthest Supernova Ever Seen Sheds Light on Dark Universe

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Image: Changes in the Rate of Expansion over Time

Changes in the Rate of Expansion over Time

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This diagram reveals changes in the rate of expansion since the universe's birth 15 billion years ago. The more shalow the curve, the faster the rate of expansion. The curve changes noticeably about 7.5 billion years ago, when objects in the universe began flying apart as a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart.

Image Type: Illustration

Credit: Ann Feild (STScI)

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