File:Gigantic Wave Discovered in Perseus Galaxy Cluster (34281272951).jpg
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Summary
[edit]DescriptionGigantic Wave Discovered in Perseus Galaxy Cluster (34281272951).jpg |
English: Combining data from NASA's Chandra X-ray Observatory with radio observations and computer simulations, an international team of scientists has discovered a vast wave of hot gas in the nearby Perseus galaxy cluster. Spanning some 200,000 light-years, the wave is about twice the size of our own Milky Way galaxy.
The researchers say the wave formed billions of years ago, after a small galaxy cluster grazed Perseus and caused its vast supply of gas to slosh around an enormous volume of space. Galaxy clusters are the largest structures bound by gravity in the universe today. Some 11 million light-years across and located about 240 million light-years away, the Perseus galaxy cluster is named for its host constellation. Like all galaxy clusters, most of its observable matter takes the form of a pervasive gas averaging tens of millions of degrees, so hot it only glows in X-rays. Chandra observations have revealed a variety of structures in this gas, from vast bubbles blown by the supermassive black hole in the cluster's central galaxy, NGC 1275, to an enigmatic concave feature known as the "bay." These waves are giant versions of Kelvin-Helmholtz waves, which show up wherever there's a velocity difference across the interface of two fluids, such as wind blowing over water. They can be found in the ocean, in cloud formations on Earth and other planets, in plasma near Earth, and even on the Sun. |
Date | |
Source | Gigantic Wave Discovered in Perseus Galaxy Cluster; see also https://www.nasa.gov/feature/goddard/2017/scientists-find-giant-wave-rolling-through-the-perseus-galaxy-cluster |
Author | NASA's Goddard Space Flight Center/Stephen Walker et al. |
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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/34281272951 (archive). It was reviewed on 12 May 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
12 May 2018
Public domainPublic domainfalsefalse |
This file is in the public domain in the United States 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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Annotations InfoField | This image is annotated: View the annotations at Commons |
Kelvin-Helmholz instability
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current | 23:57, 11 May 2018 | 4,500 × 4,130 (2.11 MB) | OceanAtoll (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CC 2017 (Windows) |
File change date and time | 15:31, 19 April 2017 |
Color space | Uncalibrated |
Date and time of digitizing | 11:00, 15 March 2017 |
Date metadata was last modified | 11:31, 19 April 2017 |
Unique ID of original document | xmp.did:6fb35fc4-5b00-6348-95a0-3e1aae1205e9 |