Expansion of the universe

Doesn't anybody know anything?

The universe is expanding at about 70 kilometers/second/megaparsec.

Hubble's law

WMAP

You would have to travel faster than this to get anywhere, but that is not difficult since gravitationally-bound areas do not expand, and the speed of celestial objects greatly exceeds the local expansion (the Milky Way galaxy has a relative velocity of about 600 km/second).

Interestingly, the relative velocity of distant galaxies can exceed c (the speed of light) since they are not traveling through space but being carried with it.

Cheers Terry.

Is this faster than c travel part of the solution to olber's paradox?



This estimate has been revised to 77...but as I understand it, the Hubble "constant" is actually not a constant, and there should be some rate of change that is the true constant, but what is the rate of change?

eventually the night sky will just be dark.