A simple question for you egg heads.

[fausTVR]

If the universe is 150 billion light years in diameter, and the big bang which lets say happened in it's centre, occurred only 13.8 billion years ago as we are told, then how have objects travelled upto 75 billion light years in 13.8 billion years, given that the cosmic speed limit is light speed?

Can anyone shed light in layman's terms for this bone head?

My question was prompted by this video https://youtu.be/i93Z7zljQ7I?t=281

[DeWar]

Because the universe is expanding, the rate of expansion is increasing over time and the rate of expansion increases as the distance between objects within the universe increases.

The speed of light as the speed limit of the universe applies to matter and energy within the universe, not the fabric of the universe (space-time) itself. So objects within the universe like galaxies can actually move apart from distant objects faster than the speed of light, not because the objects themselves are violating relativity, but because it is the space between the objects itself that is expanding “faster”.

Edited by DeWar on Thursday 18th June 18:15

Edited by DeWar on Thursday 18th June 18:15

[fausTVR]

Thanks for the replies, I'll have to look at this further to get a grip on it, I'm nowhere near ATM. Cheers.

[TwigtheWonderkid]

DeWar said:

Because the universe is expanding,

What's it expanding into?