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A comment on Astrophysicists do a 3-day long AMA about the discovery of gravitational waves. Parent comment

Re:Astrophysicists do a 3-day long AMA about the discovery o... by ghayes on Sunday February 14, 2016 @10:30PM (#11101370)
Again, asking here since it's easier, but sorry if that wasn't the intent.

To get a better understanding of what LIGO is observing, does every massive object create a gravitational wave as it moves? Do gravitational waves act similarly as to how moving a charged particle creates magnetic flux? Do we know from LIGO if gravitational waves propagate at exactly the speed of light?

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Re:Astrophysicists do a 3-day long AMA about the discovery o... by pacifist on Monday February 15, 2016 @12:27AM (#11101670)
Not on the team. Not even close. My under standing from other comments from the team is yes and yes. The reason we needed a collision of black holes was to get the signal up to where we can detect it. And they definitely said that this proves that gravitational waves propagate at the speed of light.
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Re:Astrophysicists do a 3-day long AMA about the discovery o... by versteegen on Monday February 15, 2016 @08:29AM (#11103252)
No, only accelerating objects create gravitational waves. (Massless particles have energy so also have gravitational fields and produce gravity waves when accelerating, by mass-energy equivalence.) The analogue of a gravity wave is not a magnetic field, which is created by a moving charge, but rather the electromagnetic radiation produced by an accelerating charge, e.g. synchrotron radiation or radio waves from an antenna.
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