File:Single Arm Galaxy.jpg
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Summary
[edit]DescriptionSingle Arm Galaxy.jpg |
English: NGC 4618 was discovered on 9 April 1787 by the German-British astronomer, Wilhelm Herschel, who also discovered Uranus in 1781. Only a year before discovering NGC 4618, Herschel theorised that the “foggy” objects astronomers were seeing in the night sky were likely to be large star clusters located much further away then the individual stars he could easily discern.
Since Herschel proposed his theory, astronomers have come to understand that what he was seeing was a galaxy. NGC 4618, classified as a barred spiral galaxy, has the special distinction amongst other spiral galaxies of only having one arm rotating around the centre of the galaxy. Located about 21 million light-years from our galaxy in the constellation Canes Venatici, NGC 4618 has a diameter of about one third that of the Milky Way. Together with its neighbour, NGC 4625, it forms an interacting galaxy pair, which means that the two galaxies are close enough to influence each other gravitationally. These interactions may result in the two (or more) galaxies merging together to form a new formation, such as a ring galaxy. Credit: ESA/Hubble & NASA, I. Karachentsev |
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Source | https://www.spacetelescope.org/images/potw2012a/ |
Author | ESA/Hubble & NASA, I. Karachentsev |
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current | 16:03, 23 March 2020 | 1,280 × 1,343 (467 KB) | Garamora (talk | contribs) | Uploaded a work by ESA/Hubble & NASA, I. Karachentsev from https://www.spacetelescope.org/images/potw2012a/ with UploadWizard |
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Credit/Provider | ESA/Hubble & NASA, I. Karachentsev |
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Source | ESA/Hubble |
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Date and time of data generation | 06:00, 23 March 2020 |
Software used | Adobe Photoshop CC 2019 (Windows) |
File change date and time | 15:48, 19 September 2019 |
Date and time of digitizing | 19:07, 30 August 2019 |
Date metadata was last modified | 17:48, 19 September 2019 |
Unique ID of original document | xmp.did:ff414df3-65eb-cd45-b55e-d20cd54ad1d9 |
Keywords | NGC 4618 |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, None, D-85748 Germany |
IIM version | 4 |