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December 21, 2014

December 21, 2014

Posted by **rick** on Monday, March 3, 2008 at 8:41pm.

- physics -
**drwls**, Tuesday, March 4, 2008 at 2:54amMultiply the speed of light, 3*10^8 m/s, by the number of seconds in 4.7 years.

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