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I am Alex Filippenko, astrophysicist at the University of California, Berkeley, and noted science popularizer, celebrating Astronomy Day today. AMA.
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I'm Alex Fillipenko, Astrophysist at Berkeley, and contributor to History Channel's 'The Universe', promoting 3.14 pi day! AMA
2134 upvotes
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I am Alex Filippenko, astrophysicist at the University of California, Berkeley, and noted science popularizer, celebrating Astronomy Day today. AMA.
2556
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10
9
8
7
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5
4
3
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I'm Alex Fillipenko, Astrophysist at Berkeley, and contributor to History Channel's 'The Universe', promoting 3.14 pi day! AMA
2134
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10
9
8
7
6
5
4
3
2
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