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: Supernova Remnants and Neutron Stars
I was reading from the ABC Science site that the diameter of the
Cas A gas cloud is 10 light years and the event occurred 300
years ago. That would mean that this gas cloud is moving at a
rate of close to a tenth of the speed of light. Is that
true?
The diameter of the
Cas
A remnant is about 10 light years, so the radius is about 5
light years. Since the remnant is about 300 years old, its
expansion velocity is about 5/300 (=1/60) of the speed of
light!
