>"General Relativity however simplifies to Newtonian gravity" I still don't see ... | Hacker News

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nonbel on Dec 21, 2016 | parent | context | favorite | on: Confronting the Credibility Gap for Crewed Explora...

>"General Relativity however simplifies to Newtonian gravity"

I still don't see how this is possible. In GR gravity travels at the speed of light, in Newtonian mechanics it is instantaneous. I have been unable to find an acceptable explanation for how these two very different universes can be compatible.

Crespyl on Dec 21, 2016 [–]

I think the point is that they are compatible at sufficiently small scales.

nonbel on Dec 21, 2016 | [–]

You really cannot introduce any lag at all and have newtonian gravity work. Try it, the system will soon fly apart.

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