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RE: Blackhole - For SteemSTEM Public-Domain Image Repository
The nice feature with the neutron star event is that it was followed by something visible with gamma rays. We thus had several ways to get information on the same catastrophic cosmic event: the three gravitational wave observatories plus many telescopes.
I only heard bits and pieces and that they thought it was black holes colliding.
I am starting to think that Neutron stars and their many types are worse, more destructive the black holes
They actually saw both: a bunch of black hole events and a single neutron star events.
I did some looking the other day. This is just one of the things I found. Interesting stuff
https://www.npr.org/sections/thetwo-way/2017/10/16/557557544/astronomers-strike-gravitational-gold-in-colliding-neutron-stars