Star streams that are seen around the Milky Way Galaxy are ...

[mp14]

Star streams that are seen around the Milky Way Galaxy are probably the result of:
 
  A) stars ejected from the Galaxy by gravitational encounters with the central black hole.
  B) tidal interactions with satellite galaxies.
  C) a collision with a large galaxy in the distant past.
  D) stars being pulled from the Andromeda Galaxy.
  E) spiral density waves.

Question 2

If a white dwarf gains sufficient mass, it can become a:
 
  A) brown dwarf.
  B) type II supernova.
  C) type I supernova.
  D) planetary nebula.
  E) black dwarf.

[Tonny]

Answer to Question 1

B

Answer to Question 2

C