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triffid_hunter t1_ix70n30 wrote

Reply to comment by moonsoundsonsnow in Someone tell me how the Big Bang began 13 billion years ago, yet the *observable* universe is 83 billion light years apart? by novacks0001

Doesn't matter.

Cosmic expansion behaves like new empty space is being injected everywhere all at once, not like some sort of border moving away from a specific point - ie more like bread rising in the oven than a spreading puddle.

Thus, the expansion of space looks pretty much the same from all locations.

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This_Username_42 t1_ix74byy wrote

I went to undergrad for physics and took some (not many) Astronomy courses and I do not think I knew this. Thanks

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