File:The eponymous NGC 3783 (potw2416a).jpg
![File:The eponymous NGC 3783 (potw2416a).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/The_eponymous_NGC_3783_%28potw2416a%29.jpg/614px-The_eponymous_NGC_3783_%28potw2416a%29.jpg?20240415090104)
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Summary
[edit]DescriptionThe eponymous NGC 3783 (potw2416a).jpg |
English: This image features NGC 3783, a bright barred spiral galaxy about 130 million light-years from Earth, that also lends its name to the eponymous NGC 3783 galaxy group. Like galaxy clusters, galaxy groups are aggregates of gravitationally bound galaxies. Galaxy groups, however, are less massive and contain fewer members than galaxy clusters do: where galaxy clusters can contain hundreds or even thousands of constituent galaxies, galaxy groups do not typically include more than 50. The Milky Way is actually part of a galaxy group, known as the Local Group, which contains two other large galaxies (Andromeda and the Triangulum galaxy), as well as several dozen satellite and dwarf galaxies. The NGC 3783 galaxy group, meanwhile, contains 47 galaxies. It also seems to be at a fairly early stage of its evolution, making it an interesting object of study. Whilst the focus of this image is the spiral galaxy NGC 3783, the eye is equally drawn to the very bright object in the lower right part of this image. This is the star HD 101274. The perspective in this image makes the star and the galaxy look like close companions, but this is an illusion. HD 101274 lies only about 1530 light-years from Earth, meaning it is about 85 thousand times closer than NGC 3783. This explains how a single star can appear to outshine an entire galaxy! NGC 3783 is a type-1 Seyfert galaxy, which is a galaxy with a bright central region — so it’s particularly bright itself, as far as galaxies go. In this image it is recorded by Hubble in incredible detail, from its glowing central bar to its narrow, winding arms and the dust threaded through them, thanks to five separate images taken in different wavelengths of light. In fact, the galactic centre is bright enough to Hubble that it exhibits diffraction spikes, normally only seen on stars such as HD 101274.[Image Description: A spiral galaxy, seen face-on to the viewer. The bright centre of the galaxy is crossed by a glowing bar, and it is surrounded by tightly-wound spiral arms, forming a circular shape with relatively clear edges. Faraway galaxies can be seen around it, along with a few bright stars, on a dark background. One star to the right of the galaxy is very large and extremely bright with long diffraction spikes around it.] |
Date | 15 April 2024 (upload date) |
Source | The eponymous NGC 3783 |
Author | ESA/Hubble & NASA, M. C. Bentz, D. J. V. Rosario |
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current | 09:01, 15 April 2024 | ![]() | 4,084 × 3,986 (4.89 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.esahubble.org/archives/images/large/potw2416a.jpg via Commons:Spacemedia |
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Source | ESA/Hubble |
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Credit/Provider | ESA/Hubble & NASA, M. C. Bentz, D. J. V. Rosario |
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Date and time of data generation | 06:00, 15 April 2024 |
Software used | Adobe Photoshop 25.3 (Windows) |
File change date and time | 15:01, 12 April 2024 |
Date and time of digitizing | 16:06, 22 March 2024 |
Date metadata was last modified | 17:01, 12 April 2024 |
Unique ID of original document | xmp.did:6c0c80da-480b-2146-94e0-08e1364aea5b |
Keywords | NGC 3783 |
Contact information |
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States |
IIM version | 4 |