Astronomy Notes

Part 13: Multiple Stars and Star Clusters

John P. Pratt

Binary Stars

Optical Doubles

Binary Stars

Visual Binaries

Spectroscopic Binaries

Eclipsing Binaries

Algol, the head of the Medusa which Perseus holds, it the most famous eclipsing binary.

Evolution of Binaries

Contact Binaries


Binaries with two jet streams

Epsilon Aurigae

The search for Planets around other stars

Star Clusters

There are three basic kinds of clusters, based mostly on how tightly clustered the stars are.


Open Clusters

Globular Clusters

Measuring Distances to Clusters