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Portal:Astronomy/Picture/7 August 2005. Cigar galaxy, complements of NASA. The Cigar Galaxy is an irregular galaxy 12 million light years away. It can also be called M82 or NGC 3034. The galaxy is a starburst galaxy in the Ursa Minor constellation. This image was obtained as part of the Two Micron All Sky Survey. 9 August 2005 . 10 August 2005
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects. X-radiation is absorbed by the Earth's atmosphere , so instruments to detect X-rays must be taken to high altitude by balloons , sounding rockets , and satellites .
A clickable map of the nearby circa one-sixth outer sector of the galaxy, thus clearly showing the Local Arm (Orion Arm) and neighboring arms - as well as the Great Orion Nebula (as a very luminous feature of the less bright Orion molecular cloud complex) and broad-clouds North America Nebula (and Pelican Nebula) which is an intrinsic part of the Radcliffe wave.
In the Röntgensatellit (ROSAT) image of the Moon, pixel brightness corresponds to X-ray intensity. The bright lunar hemisphere shines in X-rays because it re-emits X-rays originating from the sun. The background sky has an X-ray glow in part due to the myriad of distant, powerful active galaxies, unresolved in the ROSAT picture.
Crepuscular rays are noticeable when the contrast between light and dark is most obvious. Crepuscular comes from the Latin word crepusculum, meaning "twilight". [2] Crepuscular rays usually appear orange because the path through the atmosphere at dawn and dusk passes through up to 40 times as much air as rays from a high Sun at noon.
Messier 63 or M63, also known as NGC 5055 or the seldom-used Sunflower Galaxy, [6] is a spiral galaxy in the northern constellation of Canes Venatici with approximately 400 billion stars. [7] M63 was first discovered by the French astronomer Pierre Méchain , then later verified by his colleague Charles Messier on 14 June 1779. [ 6 ]
The galaxy is also the fifth-brightest in the sky, [13] making it an ideal amateur astronomy target. [14] It is only visible from the southern hemisphere and low northern latitudes. The center of the galaxy contains a supermassive black hole with a mass of 55 million solar masses , [ 15 ] which ejects a relativistic jet that is responsible for ...
An x-ray quiet black hole was discovered in the Tarantula Nebula, the first outside of the Milky Way Galaxy that does not radiate strongly. The black hole has a mass of at least 9 solar masses and is in a circular orbit with its 25 solar mass blue giant companion VFTS 243 .