A galactic gathering

Nearly as deep as the Hubble Ultra Deep Field, which contains approximately 10 000 galaxies, this incredible image from the NASA/ESA Space Telescope reveals thousands of colourful galaxies in the constellation of Leo (The Lion). This vibrant view of the early Universe was captured as part of the Frontier Fields campaign, which aims to investigate galaxy clusters in more detail than ever before, and to explore some of the most distant galaxies in the Universe.

Galaxy clusters are massive. They can have a tremendous impact on their surroundings, with their immense gravity warping and amplifying the light from more distant objects. This phenomenon, known as gravitational lensing, can help astronomers to see galaxies that would otherwise be too faint, aiding our hunt for residents of the primordial Universe.

MACS J1149.5+2223 is a galaxy cluster located approximately five billion light-years away. In 2012, it helped astronomers uncover one of the most distant galaxies ever discovered. Light from the young galaxy, magnified 15 times by the galaxy cluster, first shone when our 13.7-billion-year-old Universe was a mere 500 million years old — just 3.6 per cent of its current age!

In 2014 and 2015, MACS J1149.5+2223 was observed as part of the Frontier Fields campaign. While one of Hubble’s cameras observed the galaxy cluster itself, another simultaneously captured the spectacular scene pictured above, of an “unremarkable” patch of space. Referred to as a parallel field, this image — when compared to other similar fields — will help astronomers understand how the Universe looks in different directions.

Credit:

ESA/Hubble & NASA
Acknowledgement: Judy Schmidt (Geckzilla)

About the Image

Id:potw1621a
Type:Observation
Release date:23 May 2016, 06:00
Size:6683 x 6497 px

About the Object

Type:Unspecified : Cosmology : Morphology : Deep Field
Constellation:Leo
Category:Galaxies

Image Formats

Large JPEG
14.6 MB
Screensize JPEG
208.2 KB

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Wallpapers

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189.7 KB
1280x1024
308.1 KB
1600x1200
459.3 KB
1920x1200
576.3 KB
2048x1536
799.7 KB

Coordinates

Position (RA):11 49 40.54
Position (Dec):22° 18' 0.89"
Field of view:3.34 x 3.25 arcminutes
Orientation:North is 122.7° right of vertical

Colours & filters

BandWavelengthTelescope
Optical435 nm Hubble Space Telescope
ACS
Optical606 nm Hubble Space Telescope
ACS
Optical814 nm Hubble Space Telescope
ACS

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