Hubble and Chandra composite of the galaxy cluster MACS J0025.4-1222

This astounding view of galaxy cluster MACSJ0025 demonstrates how ordinary matter and mysterious dark matter interact. The blue cloud-shaped parts flanking the centre show the position of dark matter, mapped by the Advanced Camera for Surveys onboard the NASA/ESA Hubble Space Telescope. The pink middle indicates ordinary matter, charted by NASA's Chandra X-Ray Observatory.

The position of the two matter types shown in the image are explained by MACSJ0025's origin. It was formed when a pair of large galaxy clusters collided. Ordinary matter in the form of hot gas slowed down and pooled at the centre but ghostly dark matter passed straight through.

Hubble used a technique known as gravitational lensing to obtain its data. The light observed was bent by the gravitationally massive galaxy cluster, resulting in an incredibly detailed image. This technique was originally predicted by Einstein.

MACSJ0025 is located in the constellation Cetus, the Whale.

Credit:

NASA, ESA, CXC, M. Bradac (University of California, Santa Barbara, USA), and S. Allen (Stanford University, USA).

About the Image

NASA caption
Id:heic0818a
Type:Observation
Release date:27 August 2008, 16:00
Related releases:heic0818
Size:1852 x 1827 px

About the Object

Name:J0025.4-1222, MACSJ0025
Type:• Early Universe : Galaxy : Grouping : Cluster
• Early Universe : Cosmology : Phenomenon : Dark Matter
• X - Cosmology Images/Videos
Distance:z=0.584 (redshift)

Colours & filters

BandWavelengthTelescope
Optical
B
450 nm Hubble Space Telescope
ACS
Optical
V
555 nm Hubble Space Telescope
ACS
Infrared
I
814 nm Hubble Space Telescope
ACS
X-ray Chandra

Image Formats

Large JPEG
1.6 MB
Screensize JPEG
348.8 KB

Print Layout

Screensize JPEG
150.3 KB

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