Question

An astronomer would most likely use parallax to

see the Doppler shift in a star.

measure the distance to a star.

measure the temperature of a star.

see the emission spectrum of a star

Answer 1

thank you :)

Answer 2

Parallax is viewing an object from different positions, like on one side of the sun then waiting half a year and view the object from the other side of the sun. From the angles and the distance between viewing position, the distance to the object can be calculated.