File:A spiral snowflake.jpg
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[edit]DescriptionA spiral snowflake.jpg |
English: Spiral galaxies together with irregular galaxies make up approximately 60% of the galaxies in the local Universe. However, despite their prevalence, each spiral galaxy is unique — like snowflakes, no two are alike. This is demonstrated by the striking face-on spiral galaxy NGC 6814, whose luminous nucleus and spectacular sweeping arms, rippled with an intricate pattern of dark dust, are captured in this NASA/ESA Hubble Space Telescope image.
NGC 6814 has an extremely bright nucleus, a telltale sign that the galaxy is a Seyfert galaxy. These galaxies have very active centres that can emit strong bursts of radiation. The luminous heart of NGC 6814 is a highly variable source of X-ray radiation, causing scientists to suspect that it hosts a supermassive black hole with a mass about 18 million times that of the Sun. As NGC 6814 is a very active galaxy, many regions of ionised gas are studded along its spiral arms. In these large clouds of gas, a burst of star formation has recently taken place, forging the brilliant blue stars that are visible scattered throughout the galaxy. |
Date | |
Source | http://spacetelescope.org/images/potw1619a/ |
Author |
ESA/Hubble & NASA Acknowledgement: Judy Schmidt (Geckzilla) |
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current | 11:38, 16 May 2016 | ![]() | 3,970 × 3,970 (7.32 MB) | Szczureq (talk | contribs) | full resolution |
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Credit/Provider | ESA/Hubble & NASA Acknowledgement: Judy Schmidt (Geckzilla) |
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Source | ESA/Hubble |
Usage terms |
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Short title |
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Image title |
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Date and time of data generation | 06:00, 9 May 2016 |
Software used | Adobe Photoshop CC 2014 (Windows) |
Copyright status | Copyright status not set |
Unique ID of original document | xmp.did:f0314a08-d60b-1e43-8074-d56a5b4c69b3 |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
Keywords | NGC 6814 |
IIM version | 4 |