PeterDonis's latest activity

I think earlier it is mentioned that tidal gravity, the actual manifestation of curvature, is not fictitious. GW would similarly not be...

One could interpret this as saying that the theory might have to make use of unobservable quantities, but it will predict what we will...

Sounds like typical Einstein, like when someone asked him what he would have done if experiments had not confirmed the predictions of...

The only known solution I'm aware of that is geodesically incomplete but has no event horizon, only an apparent horizon (trapped...

In general, one can think of the curvature at any point in spacetime as being caused by something in the past light cone of that point...

No.

No. Yes, we do. "Infalling mass" is a specific region of spacetime, occupied by nonzero stress-energy. A portion of that region is...