What two quantities did Edwin Hubble plot against each other to discover the expansion of the Universe?
A)velocity and distance
B)luminosity and distance
C)velocity and temperature
D)luminosity and temperature
E)age and distance

Question

Quizplus · Accepted Answer

Edwin Hubble plotted the velocities of galaxies against their distances and discovered a relationship where the farther a galaxy is, the faster it is moving away. This is now known as Hubble's law and is evidence for the expansion of the universe.

What Two Quantities Did Edwin Hubble Plot Against Each Other