The rotation curve of the outer portions of the Galaxy revealed ...

[tiara099]

The rotation curve of the outer portions of the Galaxy revealed what about its mass?
 
  What will be an ideal response?

Question 2

Essentially, the Great Red Spot is
 
  A) traveling north and south across Jupiter's face.
  B) composed primarily of iron oxide.
  C) a large cyclonic storm (hurricane).
  D) always located within 10 degrees of Jupiter's north pole.
  E) Neptune's largest atmospheric feature.

[fur]

Answer to Question 1

The outer portions were moving faster than Keplerian motion, so the mass distribution is not like our centrally-focused solar system, but most of the mass lies farther out in vast amounts of dark matter.

Answer to Question 2

C