The only spacecraft to have visited Uranus and Neptune was: A) ...

[panfilo]

The only spacecraft to have visited Uranus and Neptune was:
 
  A) Pioneer 10.
  B) Pioneer 11.
  C) Voyager 1.
  D) Voyager 2.
  E) Cassini.

Question 2

What effect do even thin clouds of dust have on light passing through them?
 
  A) The light that passes through them is blue shifted due to the cloud's approach.
  B) It dims and reddens the light of all more distant stars.
  C) Even a little can completely block all light, such as the Horsehead Nebula.
  D) Its motion causes the light of stars beyond to twinkle.
  E) Its motion causes all light to be redshifted as it passes through these clouds.

[jennafosdick]

Answer to Question 1

D

Answer to Question 2

B

[panfilo]

Thanks

[jennafosdick]

Welcome