2. which of the following can be thought of as opposites? (3 points)

a) white dwarf and brown dwarf

b) black hole and protostar

c) neutron star and pulsar

d) red giant and blue giant

3. which statement is true concerning the evidence for black holes? (3 points)

a) scientists can see black holes with powerful telescopes.

b) scientists can see the effect of black holes on nearby stars.

c) scientists can see trails left in space by black holes.

d) there is no evidence for black holes.