We Know That Spiral Galaxies Contain Dark Matter Because the Gas

Q44: Today in our local universe, approximately 30

Q45: We interpret the fact that we saw

Q46: The image below was probably taken in

Q47: Spiral structure:<br>A) rotates at the same speed

Q48: Two elliptical galaxies have the same apparent

Q50: What do the broad emission lines in

Q51: The type of AGN we see depends

Q52: The Hubble tuning fork diagram represents an

Q68: What are the main components of an

Q85: In spiral galaxies, the size of the