The proper interpretation of the Hubble law (which relates the redshift of a galaxy to its distance) is that as time goes on, galaxies are____.
A) staying relatively still in space while the space between the galaxies contracts
B) moving away from a common center in space that is neither expanding nor contracting
C) staying relatively still in space while the space between the galaxies expands
D) moving away from a common center while the space between the galaxies expands
E) moving toward a common center in space that is neither expanding nor contracting

Question

Quizplus · Accepted Answer

The Hubble Law implies that galaxies are not moving through space away from a common center, but rather, the space between galaxies is expanding, causing them to move apart. This expansion of space itself is what leads to the observed redshifts of distant galaxies, consistent with the Big Bang model of the universe.

The Proper Interpretation of the Hubble Law (Which Relates the Redshift