Compare the way an optical and radio astronomer would map the ...

[ap345]

Compare the way an optical and radio astronomer would map the Galaxy.
 
  What will be an ideal response?

Question 2

Which planet had the Great Dark Spot in 1989, but had lost it by 1995?
 
  A) Jupiter B) Saturn C) Mars D) Neptune E) Uranus

[kbennett34]

Answer to Question 1

Optical astronomers try to map the distributions of visible associations of hot, young OB stars, emission nebulae, and open star clusters when visible in the disk. To get around the dust, radio observers use the 21-cm waves from neutral hydrogen, which can be observed and located all over the Galaxy.

Answer to Question 2

D

[ap345]

Thanks for the timely response, appreciate it

[at]

Wow, this really help