Why does the surface of Triton appear so young? What will be ...

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Why does the surface of Triton appear so young?
 
  What will be an ideal response?

Question 2

Harlow Shapley concluded that the Sun was not located at the center of the Milky Way Galaxy by
 
  A) mapping the distribution of stars in the galaxy.
  B) mapping the distribution of gas clouds in the spiral arms.
  C) mapping the distribution of globular clusters in the galaxy.
  D) looking at the shape of the milky band across the sky.
  E) looking at other nearby spiral galaxies.

[yasmin]

Answer to Question 1

When this KBO was trapped into orbit around Neptune recently, the tidal stresses of the retrograde capture orbit heated the interior, leading to the tectonic cantaloupe skin terrain and the liquid nitrogen geysers that covered almost all the craters.

Answer to Question 2

C

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Excellent

[nothere]

Gracias!