31–40 of 40 posts
Could be an advanced civilisation sucking all the stars energy into the back of their spaceship.
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Well, it certainly didn't happen tomorrow.
in some reference frames, yes.
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in some reference frames, yes.
No, not if we've observed it. There are predicted historical events which can be shunted into the future by running away bravely, but if you've seen them happen, you can only change how long ago.
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No, not if we've observed it. There are predicted historical events which can be shunted into the future by running away bravely, but if you've seen them happen, you can only change how long ago.
not for us, but in some other reference frame.
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not for us, but in some other reference frame.
If by "reference frame" you mean "observer who lives in the past", then yes: the past is sometimes the future of a more distant past.
As many as 30 percent of such stars
may quietly collapse into black holes
no supernova required.
Is that a significant contribution to 'dark matter'?
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If by "reference frame" you mean "observer who lives in the past", then yes: the past is sometimes the future of a more distant past.
no, relativity allows for reference frames where the event hasn't happened yet, even though it has happened for you. there's no simultaneous "it has already happened" for all frames.