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Summary
NASA diagram illustrating current theory of the Big Bang and of dark energy, the supposed repulsive force driving galaxies apart faster than any rational estimate would predict.
NASA caption
This diagram shows changes in the rate of expansion since the Universe's birth 14 billion years ago. The more shallow 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 at a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious, dark energy that is pulling galaxies apart.
Credit
NASA/STSci/Ann Feild
Copyright status
This image is credited to NASA and the Hubble Space Science Institute. Per NASA policy and applicable United States federal law, such images are in the public domain. NASA images, other than its institutional logo, or photographs of actual persons, are not subject to copyright and may be used without additional permission, unless otherwise declared.
Source
http://www.nasa.gov/images/content/56200main_dark_expansion-lg.jpg
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment |
current | 13:56, 26 July 2008 |  | 608 × 403 (28 KB) | Temlakos | NASA diagram illustrating current theory of the Big Bang and of dark energy, the supposed repulsive force driving galaxies apart faster than any rational estimate would predict. == NASA caption == This diagram shows changes in the rate of expansion since |
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