Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts?

Question

Quizplus · Accepted Answer

Spectroscopic binary stars have their orbital motion detected through spectroscopic observations of Doppler shifts in their spectral lines. Eclipsing binaries, on the other hand, are detected by observing variations in the brightness of the system as the stars eclipse each other, while visual binaries are those that can be directly observed as two separate stars. Double stars are simply two stars that appear close together in the sky, but may or may not be orbiting each other. Therefore, the best choice is C) spectroscopic binary.

Which of the Following Terms Is Given to a Pair