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Results tagged with general-relativity
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user 31335
A theory that describes how matter interacts dynamically with the geometry of space and time. It was first published by Einstein in 1915 and is currently used to study the structure and evolution of the universe, as well as having practical applications like GPS.
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Dark matter's effect in 2+1 GR?
In the appendix to The Planiverse, it is acknowledged that GR in 2 dimensional space implies no gravitational forces between separated masses--only in the interior of extended massive bodies. The auth …
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3
votes
1
answer
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Space Warps & Frame Invariance
The Alcubierre Warp Drive in Higher Dimensional
Spacetime (H. G. White & E. W. Davis), among other sources, proposes that the x-axis symmetry paradox for Alcubierre-style warp drives can be resolved …
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3
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Do curved spaces always have a preferred rest frame?
A distinguishing feature of globally curved spaces is that parallel lines don't remain equidistant--in a positively-curved space, they converge, and in a negatively-curved space, they diverge.
If the …
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6
votes
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Orbital period and velocity around a Kerr black hole relative to fixed stars
I've been trying to make progress on some of the smaller pieces of this question about the environment around a Kerr black hole. In order to calculate the effects of special relativistic Doppler shift …
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11
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0
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Radiative equilibrium in orbit of a black hole
According to Life under a black sun, Miller's planet from Interstellar, with a time dilation factor of 60,000, should be heated to around 890C by blue-shifted cosmic background radiation.
How they ar …
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4
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Conservation of potential energy for a wormhole
Disclaimer: I'm not a GR expert, but this is how this question has been explained to me by other physicists before. If I got something wrong, please correct me.
The traveler does indeed not have to e …
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