1, This scientific rule is called "Hubble's Law."

2, This became known as Hubble's law, and would help establish that the known universe is expanding.

3, Notice that, according to Hubble's law, the universe does not expand at a single speed.

4, What matters most is that Hubble's law provides a concise method for measuring a galaxy's velocity in relation to our own.

5, Given the cosmological principle, Hubble's law suggested that the universe was expanding. This idea allowed for two opposing possibilities.

6, The results of these investigations is now known as Hubble's Law.

7, The great achievements and discoveries of astrophysics in the past 20 century are reviewed, including Einstein's relativity theory, Hubble's law, and Big Bang model, etc.

8, Does this prediction of faster - than - light galaxies mean that Hubble's law is wrong?

9, He noted that the more distant galaxies were receding faster than nearby ones, in accordance with what is now known as Hubble's law (relative velocity equals distance multiplied by Hubble's constant).