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![High Redshift Galaxy Clusters](/images/nature/galaxies/high_redshift_galaxy_clusters.jpg)
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Summary
Description |
English: Like great friends, galaxies stick together. Astronomers using NASA's Spitzer Space Telescope have spotted a handful of great galactic pals bonding back when the universe was a mere 4.6 billion years old. The universe is believed to be 13.7 billion years old.
Collectively, these great galactic buddies are called galaxy clusters. A typical galaxy cluster can contain hundreds of galaxies and trillions of stars. In this false-color composite, some of the oldest galaxy clusters in the universe pose for Spitzer's Infrared Array Camera. The individual galaxies that make up the distant clusters are shown as red dots in all four images. The green blobs are Milky Way stars along the line of sight, and the blue specks are faint galaxies at various distances along the line of sight. The green and blue data are from a visible-light, ground-based telescope. The cluster at 9.1 billion light-years away (lower right panel) is currently the most distant galaxy cluster ever detected. These images are three-color composites, in which blue represents visible light with a wavelength of 0.4 microns, and green indicates visible light of 0.8 microns. The visible data were captured by the ground-based Mosaic-1 camera at the Kitt Peak National Observatory in Tucson, Ariz. Red represents infrared light of 4.5 microns, captured by Spitzer's infrared array camera. |
Date | |
Source | https://www.spitzer.caltech.edu/images/2313-sig06-006-Great-Galactic-Buddies |
Author | NASA/JPL-Caltech/S.A. Stanford (UC Davis/LLNL) |
Image use policy: https://www.spitzer.caltech.edu/info/18-Image-Use-Policy
Licensing
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This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Warnings:
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Public Domain
EXIF data: | |
File name | high_redshift_galaxy_clusters.jpg |
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Size, Mbytes | 4.4633271484375 |
Mime type | image/jpeg |
Orientation of image | 1 |
Image resolution in width direction | 300 |
Image resolution in height direction | 300 |
Unit of X and Y resolution | 2 |
Color space information | 65535 |
Exif image width | 2400 |
Exif image length | 2700 |
Software used | Adobe Photoshop CS3 Macintosh |
Copyright holder | 0 |
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