Rotating Variables

Rotating Ellipsoidal Binaries

Two stars that orbit close to each other and both take on an ellipsoidal shape

BY Draconis Variables

Close binary systems with a hot white dwarf and a cool main sequence companion that resemble BY Draconis

FK Comae Berenices Variables

Variable stars with large, cool spots on their surface that resemble FK Comae Berenices

Pulsars

Small, extremely dense, rapidly rotating neutron stars sweeping radio pulses across the sky.

Asteroids

Small, rocky, inner solar system objects that orbit the Sun and vary in reflected brightness as their orientation to Earth changes.