Evidence gathered from observations of exoplanets indicates approximately what percentage of stars ...

Evidence gathered from observations of exoplanets indicates approximately what percentage of stars have planets?
 
  A) 0
  B) 1
  C) 10
  D) 100
  E) It is not yet possible to make an estimate.

Question 2

Quasar's spectral lines are:
 
  A) emission lines with large redshifts.
  B) a continuum from the synchrotron radiation.
  C) fuzzy absorption lines from the merged light of the billions of stars.
  D) too complex for any interpretation.
  E) nonexistent, the gas so hot as to be totally ionized, so no lines are seen.

Question 3

Which of the following best describes the size and distance relationship of our Sun and the nearest star?
 
  A) A tennis ball here, another on the Moon
  B) Two beach balls separated by 100 city blocks
  C) Two grains of sand separated by 100 light-years
  D) Two golf balls separated by 300 kilometers
  E) Two baseballs separated by 100 yards

Question 4

Which of the following elements contained in your body is NOT formed in the cores of stars during thermonuclear fusion?
 
  A) hydrogen
  B) carbon
  C) calcium
  D) iron
  E) aluminum