mech@feddit.org to

Ask Science@lemmy.worldEnglish · 6 days ago

Can anyone explain the expansion of space to me?

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Can anyone explain the expansion of space to me?

mech@feddit.org to

Ask Science@lemmy.worldEnglish · 6 days ago

I just don’t get it.

According to the theory of special relativity, nothing can ever move faster than light speed.
But due to the expansion of the universe, sufficiently distant stars move away from us faster than the speed of light.
And the explanation is…that this universal speed limit doesn’t apply to things that are really far away?
Please make it make sense!

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6 days ago
That is not at all the thing you said. You said two objects moving away from each other each at the speed of light in non-expanding space would be perceived by each other as going at double the speed of light which does indeed not work like that in relativity.

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