It is difficult to use light from distant galaxies to compute the true physical distance to those galaxies today because the Universe has expanded since it was emitted.

Name: It is difficult to use light from distant galaxies to compute the true physical distance to those galaxies today because the Universe has expanded since it was emitted.
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Question

Quizplus · Accepted Answer

The expansion of the Universe stretches the light waves, causing redshift, which complicates the calculation of the current physical distance to distant galaxies.

It Is Difficult to Use Light from Distant Galaxies to Compute