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M-49 (aero-engine)
M49 or M-49 may be: * Messier 49, an elliptical galaxy in the constellation Virgo * The 49th known Mersenne prime * M49 motorway, a motorway in Great Britain * M49 (Cape Town), a Metropolitan Route in Cape Town, South Africa * M49 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa * M49 telescope, a telescope used by the United States military * M-49 (Michigan highway), a Michigan state highway * UN M49, the United Nations' "Standard Country or Area Codes for Statistical Use" * M/49, or the Neuhausen pistol, the Danish name for the SIG Sauer P210 {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Messier 49
Messier 49 (also known as M49 or NGC 4472) is a giant elliptical galaxy about away in the equatorial constellation of Virgo. This galaxy was discovered by astronomer Charles Messier in 1777. As an elliptical galaxy, Messier 49 has the physical form of a radio galaxy, but it only has the radio emission of a normal galaxy. From the detected radio emission, the core region has roughly 1053 erg (1046 J or 1022 YJ) of synchrotron energy. The nucleus of this galaxy is emitting X-rays, suggesting the likely presence of a supermassive black hole with an estimated mass of , or 565 million times the mass of the Sun (). X-ray emissions shows a structure to the north of Messier 49 that resembles a bow shock. To the southwest of the core, the luminous outline of the galaxy can be traced out to a distance of 260 kpc. The only supernova event seen within it is SN 1969Q, discovered in 1969. This galaxy has many globular clusters: estimated to be about 5,900. This is far more than the ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |