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DescriptionThe mysteries of UGC 8201.jpg |
English: The galaxy UGC 8201, captured here by the NASA/ESA Hubble Space Telescope, is a dwarf irregular galaxy, so called because of its small size and chaotic structure. It lies just under 15 million light-years away from us in the constellation of Draco (the Dragon). As with most dwarf galaxies it is a member of a larger group of galaxies. In this case UCG 8201 is part of the M81 galaxy group; this group is one of the closest neighbours to the Local Group of galaxies, which contains our galaxy, the Milky Way. UGC 8201 is at an important phase in its evolution. It has recently finished a long period of star formation, which had significant impact on the whole galaxy. This episode lasted for several hundred million years and produced a high number of newborn bright stars. These stars can be seen in this image as the dominating light source within the galaxy. This process also changed the distribution and amount of dust and gas in between the stars in the galaxy. Such large star formation events need extensive sources of energy to trigger them. However, compared to larger galaxies, dwarf galaxies lack such sources and they do not appear to have enough gas to produce as many new stars as they do. This raises an important unanswered question in galaxy evolution: How do relatively isolated, low-mass systems such as dwarf galaxies sustain star formation for extended periods of time? Due to its relative proximity to Earth UGC 8201 is an excellent object for research and provides an opportunity to improve our understanding of how dwarf galaxies evolve and grow. |
Date | |
Source | http://www.spacetelescope.org/images/potw1510a/ |
Author | ESA/Hubble & NASA |
![]() ![]() |
ESA/Hubble images, videos and web texts are released by the
ESA under the
Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the
ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the
{{PD-Hubble}} tag.
Conditions:
Notes:
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 02:52, 17 March 2015 |
![]() | 1,280 × 1,300 (811 KB) | Jmencisom | User created page with UploadWizard |
The following other wikis use this file:
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Image title |
|
---|---|
Credit/Provider | ESA/Hubble & NASA |
Source | ESA/Hubble |
Short title |
|
Usage terms |
|
Date and time of data generation | 10:00, 9 March 2015 |
Software used | Adobe Photoshop CC 2014 (Windows) |
Unique ID of original document | xmp.did:ecdd063a-b858-0347-b556-b97844d64669 |
Keywords | UGC 8201 |
Contact information |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM version | 4 |
Original file (1,280 × 1,300 pixels, file size: 811 KB, MIME type: image/jpeg)
![]() | This is a file from the
Wikimedia Commons. Information from its
description page there is shown below. Commons is a freely licensed media file repository. You can help. |
DescriptionThe mysteries of UGC 8201.jpg |
English: The galaxy UGC 8201, captured here by the NASA/ESA Hubble Space Telescope, is a dwarf irregular galaxy, so called because of its small size and chaotic structure. It lies just under 15 million light-years away from us in the constellation of Draco (the Dragon). As with most dwarf galaxies it is a member of a larger group of galaxies. In this case UCG 8201 is part of the M81 galaxy group; this group is one of the closest neighbours to the Local Group of galaxies, which contains our galaxy, the Milky Way. UGC 8201 is at an important phase in its evolution. It has recently finished a long period of star formation, which had significant impact on the whole galaxy. This episode lasted for several hundred million years and produced a high number of newborn bright stars. These stars can be seen in this image as the dominating light source within the galaxy. This process also changed the distribution and amount of dust and gas in between the stars in the galaxy. Such large star formation events need extensive sources of energy to trigger them. However, compared to larger galaxies, dwarf galaxies lack such sources and they do not appear to have enough gas to produce as many new stars as they do. This raises an important unanswered question in galaxy evolution: How do relatively isolated, low-mass systems such as dwarf galaxies sustain star formation for extended periods of time? Due to its relative proximity to Earth UGC 8201 is an excellent object for research and provides an opportunity to improve our understanding of how dwarf galaxies evolve and grow. |
Date | |
Source | http://www.spacetelescope.org/images/potw1510a/ |
Author | ESA/Hubble & NASA |
![]() ![]() |
ESA/Hubble images, videos and web texts are released by the
ESA under the
Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the
ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the
{{PD-Hubble}} tag.
Conditions:
Notes:
|
![]() |
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 02:52, 17 March 2015 |
![]() | 1,280 × 1,300 (811 KB) | Jmencisom | User created page with UploadWizard |
The following other wikis use this file:
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Image title |
|
---|---|
Credit/Provider | ESA/Hubble & NASA |
Source | ESA/Hubble |
Short title |
|
Usage terms |
|
Date and time of data generation | 10:00, 9 March 2015 |
Software used | Adobe Photoshop CC 2014 (Windows) |
Unique ID of original document | xmp.did:ecdd063a-b858-0347-b556-b97844d64669 |
Keywords | UGC 8201 |
Contact information |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM version | 4 |