Respuesta :
Hubble's law says there is a linear relationship between the speed of a galaxy moving away from us and its distance.
Answer:
Distance
Explanation:
The universe is expanding in fact the universe is undergoing accelerated expansion. The galaxies are moving away from each other. The spectrum shows red shift. According to Hubble's law, the distance to the galaxy determines its recessional velocity. Greater the distance, greater would be the recessional velocity.