When space probe Voyager 2 passed by Saturn, its speed increased ...

[OSWALD]

When space probe Voyager 2 passed by Saturn, its speed increased (but not due to firing its engines). What must have happened?
 
  A) Voyager 2 must have dipped through Saturn's atmosphere.
  B) Saturn's rotation must have sped up slightly.
  C) Saturn must have lost a very tiny bit of its orbital energy.
  D) Saturn must have captured an asteroid at precisely the moment that Voyager 2 passed by.

Question 2

The discovery of a supernova by Tycho Brahe in 1572 contradicted the commonly held belief that the universe was
 
  A) unchanging
  B) spherical
  C) infinite
  D) perfect

[janeli]

Answer to Question 1

C

Answer to Question 2

A

[OSWALD]

Excellent

[Joy Chen]

Great answer, keep it coming