In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now ...

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by
 
  a. a globular cluster.
  b. a planetary nebulae.
  c. a white dwarf.
  d. a young massive star.
  e. a supernova remnant.

Question 2

________________ emit radio energy from areas on either side of the galaxy that are inflated by jets.
 
  Fill in the blank(s) with correct word

Question 3

As material leaves an expanding star and begins to fall into a white dwarf close companion
 
  a. an accretion disk will form around the white dwarf.
  b. the material will cool off because it begins to move at high velocities.
  c. the material will fall directly straight onto the surface of the white dwarf.
  d. the white dwarf will produce a protostar.
  e. the white dwarf's iron core will collapse.