If you point toward the zenith right now and then point there ...

[EAugust]

If you point toward the zenith right now and then point there again 6 hours later, you will have pointed twice in the same direction relative to
 
  a. your horizon.
  b. the Sun.
  c. the Moon.
  d. the fixed stars.

Question 2

How much of the Earth's surface is experiencing night at any time?
 
  a. less than one-half, because of the tilt of the equator to the ecliptic plane
  b. more than one-half, because of the precession of the poles
  c. exactly one-half
  d. all of the night sky

[voltaire123]

Answer to Question 1

a

Answer to Question 2

c