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: Normal Stars, White Dwarf Stars, and Star Clusters

Q:
Sirius A & B
Sirius A & B
Sirius B is supposed to orbit Sirius A on a 50 year cycle--when did this 50th year last occur?

A:
Sirius B made its latest closest approach (periastron) to Sirius A in 1994.

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