When We Look at Close Objects, We See What Is

Q45: Astronomers believe that a _ must lie

Q46: What is a parsec?

Q47: The radiation emitted by stars, galaxies, and

Q48: What powers the Sun?

Q49: What are main-sequence stars composed of primarily?

Q51: The cosmic background radiation is _ radiation

Q52: Population II stars are originally composed of

Q53: Neutron stars are _.<br>A) dense stars where

Q54: How is all the information that we

Q55: The cosmic microwave background radiation is an