Question

according to hubbles law, what does this observation indicate about the universe? galaxies are moving closer together, and the universe is contracting. galaxies are orbiting a central point in the universe at constant speed. galaxies are stationary, and only their light waves are stretching in space. galaxies are moving away from each other, indicating that the universe is expanding.

Explanation:

Hubble's Law is based on the observation that the recessional velocity of galaxies (measured via redshift) is proportional to their distance from Earth, shown by the upward-sloping graph. This direct relationship means farther galaxies move away faster, demonstrating the universe is expanding as galaxies move apart from each other.

Answer:

Galaxies are moving away from each other, indicating that the universe is expanding.