What is "spectroscopic parallax"?
A) using stellar spectra to measure distances
B) using the apparent angular motion of stars to measure distances
C) using the redshifts of galaxy absorption lines to measure distances
D) using the apparent angular motion of galaxies to measure distances

Question

Quizplus · Accepted Answer

Spectroscopic parallax is the use of stellar spectra to measure the distance to a star. By analyzing the spectra of a star, astronomers can determine its temperature, luminosity, and chemical composition. These properties can then be used to estimate the star's distance from Earth, just as in traditional parallax measurements.

What Is "Spectroscopic Parallax