- #1
feddz
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If the galaxies we see are as they were a few million years ago, then how do we know that the universe is expanding since we don't know their current velocities?
Hubble's graph shows a linearly proportional relationship between velocity and distance but the fact that the further a galaxy is, the further in the past we are looking at isn't taken into account supposedly?
This has been torturing my brain a lot lately!
Hubble's graph shows a linearly proportional relationship between velocity and distance but the fact that the further a galaxy is, the further in the past we are looking at isn't taken into account supposedly?
This has been torturing my brain a lot lately!