All Questions
8
questions
8
votes
5
answers
1k
views
Do you always experience the gravitational influence of other mass as you see them in your frame?
You see a galaxy far away. That galaxy is attracting you with a certain amount of gravity. I'm wondering if the gravity influence of the galaxy on you, as measured by you, always ends up being what ...
- 171
13
votes
6
answers
2k
views
Is spacetime curved in a near-earth-free-falling-object's frame of reference?
If I float motionless in outer space, I will measure spacetime to be approximately flat.
By the equivalence principle, I will get flat spacetime if I am free falling near earth.
Is this right? ...
- 131
2
votes
2
answers
136
views
Attraction of matter in curved spacetime
Is there still going be a force between them (converging space which makes the two bodies meet together at a point)if both of them are absolute rest with respect any frame of reference.
user207917
2
votes
3
answers
754
views
Uniform Gravitational Field = No Gravitational Field?
I'm reading Geroch's lecture notes on GR, and in the first chapter he makes the following assertion:
People inside an elevator freely falling in a uniform gravitational field cannot distinguish ...
- 391
2
votes
1
answer
337
views
Gravity, acceleration and reference frames [closed]
Let’s say the universe was empty and suddenly an astronaut and the sun appeared 2 light years apart. Using the reference frame of the Astronaut, would he be pulled towards the sun as soon as he can ...
- 31
1
vote
5
answers
3k
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Why does time speed up when away from gravitational masses?
I read something about if an astronaut travels away from earth and comes back he/she is older because time passes faster while away from so much gravity. Would that also mean time would go slower ...
- 41
3
votes
1
answer
113
views
Is it correct to say, "Time slows down the deeper we go in a gravitational field, because some of it is converted to spatial velocity"?
Is it correct to say, "Time slows down the deeper we go in a gravitational field, because some of it is converted to spatial velocity"?
If we imagine a space-dimension on $x$-axis and Time on $y$-...
- 61
3
votes
2
answers
4k
views
How much Gravity is required to stop time?
Clocks free of gravitational influence run faster than those experiencing gravity. Is it possible for gravitational influence to bring time to a stop? Additionally can acceleration affect clocks in ...
- 470