Imagine the Universe!

Dark Energy
Movie (1.3 MB)



This one galaxy cluster is representative of over 80 clusters that were used to track the effects of dark energy on these massive objects over time. First shown in optical light, this galaxy cluster, Abell 85, is then seen in X-ray light from NASA's Chandra X-ray Observatory. Most of the matter in galaxy clusters is in the form of very hot gas, which emits copious amounts of X-rays. By studying clusters across large distances, astronomers have determined that dark energy has stifled their growth.
[Runtime: 00:10]

Credits: X-ray (NASA/CXC/SAO/A.Vikhlinin et al.); Optical (SDSS)

If words seem to be missing from the articles, please read this.

Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Barbara Mattson
Curator: Meredith Gibb
Responsible NASA Official: Phil Newman
All material on this site has been created and updated between 1997-2014.
This page last updated: Wednesday, 17-Dec-2008 09:39:26 EST