r/BeAmazed • u/billibillibillendar • Nov 27 '24

Science If you travel close to the light

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u/EmmalouEsq Nov 27 '24

I understand that when returning to earth from Andromeda, it's 4 million years into the future, but could we send signals back to earth that would get back here within a human lifetime? If we were constantly sending some sort of signals back, how would that work? Would they be stretched out over time to make it a complete waste of resources on the space craft?

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u/Technical-County-727 Nov 28 '24

No because signals move with the speed of light as well. Send a signal from middle way and it will take 1 million years to reach earth

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u/megagngn Nov 28 '24

The classic. Why don't we travel at speed of light and then send a signal that travels with speed of light from our spacecraft?

Then we get two times speed of light.