Determining the Hubble Constant

Use your Hubble plot to answer the questions.

It's important to note that when we observe galaxies that appear to be moving away from us, we are not observing the actual movement of galaxies through space. A useful way to think about why galaxies appear to move away from each other is to think of galaxies fixed to a certain point in space, and that space is expanding. This causes galaxies to become farther apart from one another.

The relationship you have been exploring between a galaxy’s recessional velocity and its distance is known as the Hubble-Lemaitre Law.

Checkpoint

Hubble Plot

Distance (Mpc)Velocity (km/s)