Based on star counts, 100 years ago most astronomers thought: ...

[kfurse]

Based on star counts, 100 years ago most astronomers thought:
 
  A) we lay about 30,000 ly out from the center of the Galaxy.
  B) we lay near the center of a disk about 10 kpc wide and 2 kpc thick.
  C) we lay in a spiral arm of the largest galaxy in the universe.
  D) we lay near the edge of the only galaxy in the universe.
  E) we were not a part of any structure larger than the known solar system.

Question 2

Radio astronomy uses ________ to achieve better resolution than optical telescopes.
 
  Fill in the blank(s) with correct word

[Sassygurl126]

Answer to Question 1

B

Answer to Question 2

interferometry

[kfurse]

Excellent

[Zebsrer]

TYSM