Which of the following is an advantage of using parallax rather than the Doppler effect to determine star distance?
Answer

The Doppler effect can be used only for sounds in space.

Parallax is more accurate for stars that are very far away.

Doppler shift indicates only a change in location, not actual distance.

Parallax is easier to use than Doppler shift.

Question

Which of the following is an advantage of using parallax rather than the Doppler effect to determine star distance?
Answer
		
The Doppler effect can be used only for sounds in space.
		
Parallax is more accurate for stars that are very far away.
		
Doppler shift indicates only a change in location, not actual distance.
		
Parallax is easier to use than Doppler shift.

anonymous · Answer

Doppler shift is a velocity dependent effect, not a position dependent effect, so it doesn't tell you where the star is, only how fast it's moving.