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Top o' da marnin' to ye, Rallypoint, and welcome to the March 17th Astronomy Picture of the Day (APOD): "Centaurus A." What is an 'active' galaxy? It is one that has a much-higher-than-normal luminosity over at least some portion of the electromagnetic spectrum that does not originate from stars. We are talking of emissions in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands. Researchers believe that such observations are produced from the accretion of matter by a supermassive black hole at the center of the galaxy. Such is the case with Centaurus A.
Also known as NGC 5128, Centaurus A was discovered by James Dunlop on August 4, 1826. John Herschel was the next document the galaxy on June 1, 1834.Based on radio emissions, the suspected black hole at the center of Centaurus A is over 1 billion times the mass of our Sun. It lies over 10 million light years away in the southern Constellation Centaurus.
Also known as NGC 5128, Centaurus A was discovered by James Dunlop on August 4, 1826. John Herschel was the next document the galaxy on June 1, 1834.Based on radio emissions, the suspected black hole at the center of Centaurus A is over 1 billion times the mass of our Sun. It lies over 10 million light years away in the southern Constellation Centaurus.
APOD: 2022 March 17 - Centaurus A
Posted from apod.nasa.gov
NASA
Space
Science
Photography
Astronomy
Posted >1 y ago
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Happy St Paddy's Day to you and the entire RP gang. I really enjoy your posts. I just got into Astronomy last year. Bought my first telescope and am now working on camera equipment. I've always been a star gazer, especially when out to sea. Its just so beautiful up there. Makes you know there is something out there a lot more greater than us. Only God could create the beautiful universe we are lucky to spend our short years in. Thanks again.
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