Visual Binary Stars are separated in a telescope. Spectroscopic Binary See two sets of spectral lines Doppler shifted due to orbital motion.
Stars cross in front of one another.
It should read 7 on the top and 8 on the bottom. Binary Stars Newton's laws allow us to determine the total mass in a binary system. Harmonic Law Apply all laws to binary stars 1. Law of Ellipses Orbits are ellipses 2. Law of Areas Equal areas in equal time.