Dactyl was photographed by the Galileo spacecraft. It is:

Dactyl was photographed by the Galileo spacecraft. It is:
 
  A) a moon of the asteroid Ida.
  B) a moon of Halley's Comet.
  C) one of the small moons of Jupiter, thought to be a captured asteroid.
  D) one of the larger asteroids found in the asteroid belt.
  E) an Earth-crossing asteroid.

Question 2

The separation of the ________ force from the Grand Unified Force was accompanied by the release of energy which went into forcing an immense inflation of the size of the universe.
 
  Fill in the blank(s) with correct word

Question 3

Since the difference in energy between the different rotational states in a molecule is very small, many molecular lines can be observed with:
 
  A) visible light spectrometers.
  B) radio or microwave telescopes.
  C) high energy observatories like Chandra, in orbit above our atmosphere.
  D) ultraviolet balloons flying above the ozone layer.
  E) infrared telescopes on mountaintops.

Question 4

What part of a comet points most directly away from the Sun?
 
  A) the nucleus
  B) the coma
  C) the jets of gas
  D) the plasma tail
  E) the dust tail

Question 5

The temperature of the innermost part of the spinning gas near our galaxy's central black hole is:
 
  A) 2.7 K.
  B) 300 K.
  C) 10,000 K.
  D) over 1,000,000 K.
  E) varying rapidly from 300 K to 1,000,000 K.