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.
Chandra 101: Overview for Teachers and Students
Page: 1 2 3 4 5 6 7 8
A Look at X-Rays

X-ray AbsorptionWhy can't we have earthbound X-ray observatories?
X-ray observatories must be placed high above the Earth's surface because the Earth's atmosphere absorbs x-rays. This means that the ultra-precise mirrors and detectors -- together with the sophisticated electronics that convey the information back to Earth -- must be able to withstand the rigors of a rocket launch and operate in the hostile environment of space.