Zooming Black Holes Can Reach ~10% The Speed of Light, Scientists Say
Zooming Black Holes Can Reach ~10% The Speed of Light, Scientists Say
Black holes could be right now zooming through the Universe at astonishing speeds just under 10 percent of the speed of light.
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Relative to what exactly?
Probably relative to the CMB (the frame of reference where there is no redshift or blueshift bias in any direction).
Thank you! At that scale the simpler answers just don’t feel sufficient
Relative to their point of origin.
At that speed, relative to most nearby large object
But what if all nearby objects are moving towards it at a similar speed? Or away? At such a large scale speed becomes a mind bending thing.
No other large object will be moving close to that speed so it'll be almost like they are standing still.