What Is the Most Likely Candidate for Making Up the Dark

Q71: How do astronomers know that AGNs are

Q81: Elliptical galaxies appear red because:<br>A) they are

Q82: How did Hubble use his tuning fork

Q83: Dust in galaxies does not count as

Q84: Why do rotation curves of galaxies imply

Q85: If you measure the velocity of a

Q87: We classify galaxies by:<br>A) their true shapes<br>B)

Q88: How did astronomers determine that elliptical galaxies

Q89: What is the approximate percentage of nearby

Q90: If the rotational speed of the