Images by Date
Images by Category
Solar System
Stars
White Dwarfs
Supernovas
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Quasars
Galaxy Clusters
Cosmology/Deep Field
Miscellaneous
Images by Interest
Chandra for Kids
Multiwavelength
Sky Map
Constellations
3D Wall
Photo Blog
Top Rated Images
Image Handouts
Desktops
High Res Prints
Fits Files
Image Tutorials
Photo Album Tutorial
False Color
Cosmic Distance
Look-Back Time
Scale & Distance
Angular Measurement
Images & Processing
AVM/Metadata
Getting Hard Copies
Image Use Policy
Web Shortcuts
Chandra Blog
RSS Feed
Chandra Mobile
Chronicle
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Abell 1689 Animations
Click for low-resolution animation
Tour of Abell 1689
Quicktime MPEG
Abell 1689 is a massive cluster of galaxies located about 2.3 billion light-years away. An image obtained by the Chandra X-ray Observatory shows hot gas that fills the space between the galaxies. This gas is about 100 million degrees, and therefore glows brightly in X-rays. An image in optical light taken with the Hubble Space Telescope shows the individual galaxies not seen in the Chandra image. Some of the galaxies in the Hubble image that lie beyond the cluster appear as long arcs because their light has been distorted by the immense mass in the intervening galaxy cluster. Taken together, the data from Chandra and Hubble show that Abell 1689 is a galaxy cluster that is in the process of merging with another. Astronomers are studying Abell 1689 to learn more about the distribution of mass as well as the unseen dark matter that is thought to pervade the system.
[Runtime: 01:06]

(Credit: X-ray: NASA/CXC/MIT/E.-H Peng et al; Optical: NASA/STScI)


Return to Abell 1689 (September 11, 2008)