Nearly every aspect of astronomy is related in some way to the existence of gravity and to the ...

Nearly every aspect of astronomy is related in some way to the existence of gravity and to the motions which are responsible for a balance against gravity. How does this balance play a role for the miscellaneous objects of the solar system (i.e.
 
  , the asteroids and comets)? How can some aspect of this be used as a tool to determine masses in the solar system?

Question 2

The Milky Way is often considered to be an intermediately wound, barred spiral, which would be type ________ according to Hubble.
 
  A) E4
  B) Sa
  C) SBb
  D) SBV
  E) B2S

Question 3

The Earth's orbital eccentricity does not play a major role in our seasons, for perihelion occurs in January. Is this true on Mars also?
 
  What will be an ideal response?

Question 4

In terms of ________, all the terrestrials are greater than any of the jovians.
 
  Fill in the blank(s) with correct word

Question 5

The process occurring when photons bounce off a polished surface is called:
 
  A) diffraction.
  B) refraction.
  C) reflection.
  D) dispersion.
  E) interference.

Question 6

Every red dwarf star that ever joined the main sequence is still there today.
 
  Indicate whether the statement is true or false