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Feb 18, 2016 at 4:17 comment added JDługosz Before the recent merger event observation, we already knew that black holes existed. E.g. syg A* shows stars making hairpin turns around an enormous mass that's small and invisible.
Feb 17, 2016 at 21:49 history edited PMD CC BY-SA 3.0
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Feb 17, 2016 at 21:34 review First posts
Feb 17, 2016 at 21:41
Feb 17, 2016 at 21:31 history answered PMD CC BY-SA 3.0