PeterDonis's latest activity

I think this is a very simplistic view. Even if the event horizon of Sag A (assuming that Sag A is in fact a true black hole with a...

According to one view of science, yes. But that is not the only possible view.

As I said, experiments in other scenarios where the spacetime curvature and other physical parameters are similar to those that our...

Yes, you can. The literature is full of calculations of what goes on inside black holes. In the sense that, if what we call "black...

The point about an event horizon is that you cannot communicate from inside it to outside it, so dropping someone inside is pointless...

We don't. Prevailing opinion is that GR stops being an accurate model somewhere inside (or possibly even outside, although I think...

According to the theory of relativity or the Lorentz transformation formula, time passes more slowly for a moving object than for a...

No, it proves you didn't understand both theory of relativity AND answers you've been given. Read them again.

That is a simplification of a special case. Your scenario is not that special case. You can ask the question, but as we've already said...

Do also note, @Huangdongcheng, that you are simply proposing a messier version of the twin paradox scenario. Your use of circular motion...

That is a very common misunderstanding, one that unfortunately has been repeated over and over by well-meaning people trying to explain...

There is a short answer to which one will show more elapsed time between meetings - I gave it in my previous post. But "which clock...

Yes, because you have posed a complicated problem, likely much more complicated than you realize. It might be helpful if you could tell...

You are considering a problem where gravity is a significant factor, which means you need to consider GR not SR. In this particular case...

Note that in the calculations posted earlier in the thread, the mass of the central object (whether it's a black hole or the planet...