Hubble image of MACS J0717 with mass overlay

This enormous image shows Hubble’s view of massive galaxy cluster MACS J0717.5+3745. The large field of view is a combination of 18 separate Hubble images.

Studying the distorting effects of gravity on light from background galaxies, a team of astronomers has uncovered the presence of a filament of dark matter extending from the core of the cluster. 

The location of the dark matter is revealed in a map of the mass in the cluster and surrounding region, shown here in blue. The filament visibly extends out and to the left of the cluster core.

Using additional observations from ground-based telescopes, the team was able to map the filament’s structure in three dimensions, the first time this has ever been done. The filament was discovered to extend back from the cluster core, meaning we are looking along it.

Credit:

NASA, ESA, Harald Ebeling (University of Hawaii at Manoa) & Jean-Paul Kneib (LAM)

About the Image

Id:heic1215a
Type:Observation
Release date:15 October 2012, 18:00
Related releases:heic1215
Size:18956 x 10646 px

About the Object

Name:MACS J0717.5+3745
Type:• Early Universe : Galaxy : Grouping : Cluster
• X - Cosmology Images/Videos

Colours & filters

BandWavelengthTelescope
Optical
V
606 nm Hubble Space Telescope
ACS
Optical
V+I
Hubble Space Telescope
ACS
Optical
I
814 nm Hubble Space Telescope
ACS

Image Formats

Large JPEG
171.5 MB
Screensize JPEG
166.3 KB

Zoomable


Wallpapers

1024x768
264.1 KB
1280x1024
385.8 KB
1600x1200
528.9 KB
1920x1200
638.0 KB
2048x1536
801.6 KB

Also see our