All Questions
Tagged with observable-universe special-relativity
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Other Hubble spheres with no Lorentz symmetry?
Perhaps this may be a stupid question but anyways here it goes...
If the Lorentz symmetry is not global but rather local, wouldn't that mean that is possible that other Hubble spheres outside our ...
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How fast would we have to go for the red(/blue)shifts of galaxies ahead of us to differ from those behind us with statistical significance?
Here, we are looking for a statistically significant difference between the mean redshifts of galaxies ahead and those behind, with reference to a prior-specified direction. For example, suppose that ...
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How long would it take to reach the edge of the reachable universe?
How long would it take to reach the current edge of the reachable portion of the universe, with the following bounds in mind:
We figure out a way build a space ship to provide a constant 1 G ...
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Photon Paradox?
Imagine a photon reaching the Hubble Space Telescope today had originally been emitted from a star in the early universe 13 billion years ago. Einstein’s Special Relativity tells us, traveling at the ...
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