What is the difference between spectroscopic and visual binaries?
A) Spectroscopic binaries have double spectral lines but do not move.
B) Visual binaries are pairs of stars in the same region in the sky but are not gravitationally interacting.
C) A visual binary does not show changes in the spectral lines.
D) In a visual binary we can see two distinct stars; in spectroscopic binaries, the images of the two stars cannot be resolved.

Question

Quizplus · Accepted Answer

In a visual binary, the two stars can be seen separately through a telescope. In a spectroscopic binary, the stars are too close to be resolved visually, and their binary nature is revealed through their spectral lines.

What Is the Difference Between Spectroscopic and Visual Binaries