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: Cosmology
How can I find the absolute diameter and distance away of an
object?
For small red shifts, the distance d = z c/H, where z is the red
shift, c is the speed of light, and H is the Hubble constant.
The absolute diamete D is related to the angular diameter A by D
= Ad, where A is in radians. For red shifts greater than about
0.1 See:
http://www.astro.ucla.edu/~wright/CosmoCalc.html
.
