Astrophysicist at UC Berkeley and 2006 National Professor of the Year
San Francisco Bay Area
Joined March 2010
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Check out my latest AMA on Reddit to celebrate Astronomy Day!
reddit.com/r/space/comments/… #astronomyday
Conducting an AMA on Reddit now in the spirit of Astronomy Day! Ask me anything: reddit.com/r/IAmA/comments/2…
Alex Filippenko retweeted
@nascarlady51 I had a piece of cherry pie today in celebration of Pi Day-had pizza pie last night.