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

Parallax is easier to use than Doppler shift.
Parallax is more accurate for stars that are very far away.
The Doppler effect can be used only for sounds in space.
Doppler shift indicates only a change in location, not actual distance

Question

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

braedyn15 · Answer

i think its D but not sure so can someone please help me

tennis5518 · Answer

By Doppler effect I assume you mean how light waves shift from red to blue as they travel through an expanding universe.  That's very hard to measure in shorter distances.  Easier over greater distances.
Parallax works very well at short distances, and worse and worse the further away you are.