S, ROUND 5  4  years old. For ten points, identify this ratio of the relative speed of galaxies to their distance from one another.
S, ROUND 5  4  years old. For ten points, identify this ratio of the relative speed of galaxies to their distance from one another.
S, ROUND 5  4  years old. For ten points, identify this ratio of the relative speed of galaxies to their distance from one another.
Hubble number or constant or ratio