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A comment on Stars may collide in a “red nova” in 2022. Parent comment
The collision did already happen, from our frame of reference. Its light arriving to us will be just a confirmation.
From some other frame of reference (one moving very fast in the line that joins Earth and the collision), it might not have happened yet.
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The collision did already happen, from our frame of reference. Its light arriving to us will be just a confirmation.
From some other frame of reference (one moving very fast in the line that joins Earth and the collision), it might not have happened yet.