The light gathering ability of a telescope is most dependent on the diameter of its primary ...

The light gathering ability of a telescope is most dependent on the diameter of its primary objective.
 
  Indicate whether the statement is true or false

Question 2

The first clue to the significance of quasars came from the discovery that some of these stars were much stronger radio sources than any normal star.
 
  Indicate whether the statement is true or false

Question 3

Which star spends the longest time in the protostellar phase of life?
 
  A) a 1-solar-mass star
  B) a 2-solar-mass star
  C) a 3-solar-mass star
  D) a 4-solar-mass star
  E) a 5-solar-mass star

Question 4

The nebular theory of the formation of the solar system successfully predicts all but one of the following. Which one does the theory not predict?
 
  A) Planets orbit around the Sun in nearly circular orbits in a flattened disk.
  B) the compositional differences between the terrestrial and jovian planets
  C) the equal number of terrestrial and jovian planets
  D) asteroids, Kuiper-belt comets, and the Oort cloud
  E) the craters on the Moon