The new observations also indicate that the two galaxies are about 30,000 light - years apart, moving at roughly several hundred kilometers per second relative to each other. (sciencedaily.com)
Some galaxies drive galactic winds, expelling dust and gas at hundreds of kilometers per second into the intergalactic medium, the space between galaxies. (discovermagazine.com)
The improved Hubble constant value is 73.2 kilometers per second per megaparsec. (sciencedaily.com)