Our most detailed maps of Venus come from A) direct ...

[Pineappleeh]

Our most detailed maps of Venus come from
 
  A) direct observation from Earth-based optical telescopes.
  B) Earth-based radio telescopes.
  C) the Hubble Space Telescope.
  D) manned landings.
  E) the Magellan space probe.

Question 2

Two stars both have parallaxes of 0.023, but star A has apparent magnitude +2.3, while star B is magnitude +7.3. Which statement is true?
 
  A) Star B must be ten times more luminous.
  B) Star A is both 100 brighter and larger than star B.
  C) Star A is both 100 brighter and more luminous than star B.
  D) Star A must be ten times closer.
  E) Nothing, since we do not know their absolute magnitudes.

[miss_1456@hotmail.com]

Answer to Question 1

E

Answer to Question 2

C

[Pineappleeh]

Excellent

[parshano]

Gracias!