An overview of the Chandra mission and goals, Chandra's namesake, top 10 facts.
Classroom activities, printable materials, interactive games & more.
Overview of X-ray Astronomy and X-ray sources: black holes to galaxy clusters.
All Chandra images released to the public listed by date & by category
Current Chandra press releases, status reports, interviews & biographies.
A collection of multimedia, illustrations & animations, a glossary, FAQ & more.
A collection of illustrations, animations and video.
Chandra discoveries in an audio/video format.
Q&A: Miscellaneous X-ray Sources

Q:
Is there such a thing as a red dwarf? If so, how is it different from a white or brown dwarf?

A:
A red dwarf is a star that has a mass between approximately 8% and 50% of the mass of the Sun. It is different from a brown dwarf in that its interior is hot enough to sustain hydrogen fusion reactions as a supply of energy. It will eventually (in 20 billion years or so) turn into a white dwarf, a collapsed star in which no nuclear reactions occur in the center. The pressure for support against gravity is supplied by degenerate electron pressure. See the entries in our Field Guide.

Back | Index