Messier 110. Messier 110 (also known as The Edward Young Star and NGC 205) is a dwarf elliptical galaxy that is a satellite of the Andromeda Galaxy.[4] M110 contains some dust and hints of recent star formation, which is unusual for dwarf elliptical galaxies in general.[4] History[edit] Although Charles Messier never included the galaxy in his famous list, it was depicted by him, together with M32, on a drawing of the Andromeda galaxy; a label on the drawing indicates that Messier first observed NGC 205 on August 10, 1773.[5] The galaxy was independently discovered by Caroline Herschel on August 27, 1783; her brother William Herschel described her discovery in 1785.[5] The suggestion to assign the galaxy a Messier number was made by Kenneth Glyn Jones in 1967.[6] In 1999, Johnson and Modjaz discovered a nova in M110.[7] Unlike M32, NGC205 does not show evidence for a supermassive black hole at its center.[8] See also[edit] Andromeda's satellite galaxies References[edit] Jump up ^ A.W.
External links[edit] Messier 32. Picture of the Andromeda Galaxy, showing M32 (above left of centre) The structure and stellar content of M32 is difficult to explain by traditional galaxy formation models. Recent simulations suggest a new scenario in which the strong tidal field of M31 can transform a spiral galaxy into a compact elliptical. As a small spiral galaxy falls into the central parts of M31, most of the outer layers of the smaller spiral are stripped away. The central bulge of the galaxy is much less affected and retains its morphology. Distance measurements[edit] At least two techniques have been used to measure distances to M32. Black Hole[edit] M32 contains a supermassive black hole. Notes[edit] ^ average(755 ± 28, 770 ± 40) = ((755 + 770) / 2) ± ((282 + 402)0.5 / 2) = 763 ± 24 See also[edit] References[edit] External links[edit] Coordinates: 00h 42m 41.8s, +40° 51′ 55″ Andromeda Galaxy. The Andromeda Galaxy ( / æ n ˈ d r ɒ m ɨ d ə / ) is a spiral galaxy approximately 2.5 million light-years (2.4 × 10 19 km) from Earth [ 4 ] in the Andromeda constellation .
Also known as Messier 31, M31 , or NGC 224 , it is often referred to as the Great Andromeda Nebula in older texts. The Andromeda Galaxy is the nearest spiral galaxy to our Milky Way galaxy, but not the closest galaxy overall. It gets its name from the area of the sky in which it appears, the constellation of Andromeda , which was named after the mythological princess Andromeda . The Andromeda Galaxy is the largest galaxy of the Local Group , which also contains the Milky Way, the Triangulum Galaxy , and about 30 other smaller galaxies. The Andromeda Galaxy is estimated to be 7.1 × 10 11 solar masses . [ 2 ] In comparison a 2009 study estimated that the Milky Way and M31 are about equal in mass, [ 13 ] while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. . [ edit ] General. Andromeda_IAU. Andromeda (constellation) Johannes Hevelius's depiction of Andromeda, from the 1690 edition of his Uranographia.
As was conventional for celestial atlases of the time, the constellation is a mirror image of modern maps as it was drawn from a perspective outside the celestial sphere. Andromeda as depicted in Urania's Mirror, a set of constellation cards published in London c. 1825, showing the constellation from the inside of the celestial sphere Photo of the constellation Andromeda, as it appears to the naked eye. Lines have been added for clarity. Andromeda was one of the original 48 constellations formulated by Ptolemy in his 2nd-century Almagest, in which it was defined as a specific pattern of stars. An Arab constellation called "al-Hut" (the fish) was composed of several stars in Andromeda, M31, and several stars in Pisces. ν And, μ And, β And, η And, ζ And, ε And, δ And, π And, and 32 And were all included from Andromeda; ν Psc, φ Psc, χ Psc, and ψ Psc were included from Pisces.
Andromeda, Triangulum.