Author Question: The visible color of the Galactic Bulge is A) red from the emission nebulae. B) blue from the OB ... (Read 72 times)

KWilfred · **on:** Jul 27, 2018

The visible color of the Galactic Bulge is

A) red from the emission nebulae.
B) blue from the OB associations.
C) black from the dust clouds.
D) yellow from the old Population II stars.
E) brown from the dwarfs in the dark matter.

Question 2

Why do we know much more about the surface of Mars than that of Venus?

What will be an ideal response?

Jbrasil · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

D

Answer to Question 2

Venus has a thick cloud cover that prevents us from seeing the surface with visible light. Radar can map the surface, but its longer wavelength means the resolution is worse. Mars' atmosphere is thin enough that we can see surface detail from Earth. Also, we have landed several spacecraft on Mars, some of which have traveled over the surface. The few spacecraft that made successful soft landings on Venus were very short lived.