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we_are_all_bananas_2 t1_j3dumhb wrote

If you put your finger over a star in the sky, you are preventing photons that have travelled to Earth undisturbed for millions of years from finally entering your eye.

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ontopofyourmom t1_j3e6dol wrote

Most likely hundreds, thousands, or tens of thousands of years... and that's only from your finger's point of view, for the photon it is just and instant.

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