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A comment on Do we really travel through time with the speed of light?. Parent comment

Re:Do we really travel through time with the speed of light? by Aerroon on Monday August 31, 2020 @03:14AM (#24329158)
I wonder if black holes or neutron stars in a solar system are necessary for a civilization to start exploring the universe outside of their own solar system. It could be quite a boon to have something like that in the outer solar system for gravity assists.
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