Zoom in on Abell 1689

This video zooms in on the galaxy cluster Abell 1689. Overlaid in purple is the distribution of dark matter in the galaxy cluster. The distribution of normal and dark matter in the lens, the relative geometry of the lens and distant galaxies behind the cluster, and the effect of dark energy on the geometry of the universe, together explain the distorted shapes of some of the galaxies visible here. Astronomers are able to use this relationship to probe the properties of dark energy.


NASA, ESA, ESO/Digitized Sky Survey 2, E. Jullo (JPL/LAM), P. Natarajan (Yale) and J-P. Kneib (LAM). Music: John Dyson (from the album "Moonwind"). Acknowledgment: Davide De Martin

About the Video

Release date:19 August 2010, 20:00
Related releases:heic1014
Duration:56 s
Frame rate:30 fps

About the Object



Large QT
13.6 MB


Video Podcast
10.2 MB
Medium MPEG-1
23.7 MB
Medium Flash
11.5 MB


Small Flash
5.3 MB
Small QT
3.3 MB

For Broadcasters

Also see our

Privacy policy Accelerated by CDN77