March 12, 1999 Astronomy Picture of the Day shows the red giants of the old globular star cluster M10.

Learn about Betelgeuse, also known as Alpha Ori, an M supergiant star. Discover what is in this massive star's future.

Illustrated guide to a star's evolution after the red giant phase. Learn about the chemical and physical processes going on in the star.

Concise description of the red-giant phase of a star. Includes links to related terms.

June 2, 1999 article explains the evidence that lithium-rich giants are created when the stars swallow closely-orbiting planets.

View two diagrams illustrating key concepts of red giants. Learn about the red-giant phase the sun will eventually move into.

Enjoy a high-energy astronomer's description of a red giant star. Includes a basic overview of the hydrogen-to-helium conversion in stars.

Learn how stars become red giants and what their structure in this phase is like. Includes an overview of core-helium fusion.

View a Q&A on how much a teaspoon of a red giant would weigh. Includes a comparison to the comparative weight of white dwarfs and neutron stars.

Browse through current and previous issues of the Ohio State University Astronomy Department's newsletter on red giant stars.

Paper from the "Electronic Publications of the Astronomical Society of Australia" on variable red giants in the Large Magellanic Clouds.