Why do our best radar maps of Venus come from the Magellan space ...

[Jkov05]

Why do our best radar maps of Venus come from the Magellan space probe?
 
  What will be an ideal response?

Question 2

The location of the Galactic Center was first found by Harlow Shapley with:
 
  A) radio emissions from Sagittarius A.
  B) Cepheids of Population I in the spiral arms.
  C) RR Lyrae variables in the globular clusters.
  D) planetary nebulae in the open clusters.
  E) infrared observations of the heat from its accretion disk around the black hole.

[mcinincha279]

Answer to Question 1

Magellan went into orbit around Venus and used radar to penetrate the clouds and map the surface. Visual wavelength telescopes cannot see through the clouds.

Answer to Question 2

C

[Jkov05]

Wow, this really help

[EAN94]

Thanks for the timely response, appreciate it