Binary Stars Astronomy Lecture
Posted on 22nd February, 2012 by Chaz
A single introductory astronomy lecture on Binary Stars, including several useful diagrams.
Because of gravity. However, gravity is not restricted to between large and small bodies, stars can revolve around stars as well. In fact, 85% of the stars in the Milky Way galaxy are not single stars, like the Sun, but multiple star systems, binaries or triplets. If two stars orbit each other at large separations, they evolve independently and are called a wide pair. If the two stars are close enough to transfer matter by tidal forces, then they are called a close or contact pair. Binary stars