AAS Hangout: The Black Hole in the Center of our Galaxy

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Our first AAS hangout went better than I could have hoped! Lots of great conversation about black holes, and the center of our galaxy.
Also had a surprise visit from John Grunsfeld, head of the science mission directorate at NASA (Oh and he's an astronaut and repaired the Hubble the last time, no big whup). He's at 46:20 if you want to jump straight to it.
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