What is important in Hubble's discovery about the red shift in the spectra of galaxies? a. It proves the Big Bang theory. b. It suggests the existence of black holes. C. It suggests that the universe is expanding. d. It suggests that the universe is contracting.

Answer

It suggests that the universe is expanding.

Q: Who is Hubble? A: Edwin Hubble was an American astronomer who made important observations and discoveries in astronomy. One of his most important discoveries was the discovery of the expansion of the universe.
Q: What is the red shift in the spectra of galaxies? A: The red shift is a phenomenon where light waves are stretched, causing the light to appear more towards the red end of the spectrum. This is an indication of the motion of the galaxy, and the extent of the red shift indicates how fast the galaxy is moving away from us.
Q: What is important in Hubble's discovery about the red shift in the spectra of galaxies? A: The discovery of the red shift in the spectra of galaxies suggested that the universe is expanding. The further away a galaxy is from us, the faster it appears to be moving away, which indicated that the universe is not static, but rather expanding.

What is important in Hubble's discovery about the red shift in the spectra of galaxies? a. It proves the Big Bang theory. b. It suggests the existence of black holes. C. It suggests that the universe is expanding. d. It suggests that the universe is contracting.​