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Wednesday, December 25, 2013

Bigger Picture

NPR: The Christmas Now: How To Be The Center Of The Universe
Catch a glimpse of a relatively nearby star and you see it as it existed when the light left the star's surface, perhaps when Lincoln was president (if the star is 150 light-years away). Some stars near the edges of our own galaxy are seen as they appeared when the last ice age was in full bloom.

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