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Maffei 1
Maffei 1 is a giant elliptical galaxy in the constellation Cassiopeia . Once believed to be a member of the Local Group of galaxies, it is now known to belong to its own group, the IC 342/Maffei Group . It was named after Paolo Maffei , who discovered it and the neighboring Maffei 2 in 1968 via their infrared emissions.
Messier 32
Picture of the Andromeda Galaxy, showing M32 (above left of centre) Messier 32 (also known as NGC 221 and Le Gentil ) is a dwarf elliptical galaxy about 2.65 million light-years away in the constellation Andromeda . M32 is a satellite galaxy of the famous Andromeda Galaxy (M31) and was discovered by Le Gentil in 1749 .The Triangulum Galaxy is a spiral galaxy approximately 3 million light years (ly) from Earth in the constellation Triangulum . It is catalogued as Messier 33 or NGC 598 , and is sometimes informally referred to as the Pinwheel Galaxy , a nickname it shares with Messier 101 . The Triangulum Galaxy is the third-largest member of the Local Group of galaxies, which includes the Milky Way Galaxy , the Andromeda Galaxy and about 30 other smaller galaxies. It is one of the most distant permanent objects that can be viewed with the naked eye . [ edit ] Visibility and nomenclature
Messier 33
Messier 49 (also known as M 49 or NGC 4472 ) is an elliptical galaxy located about 49 million light-years away in the equatorial constellation of Virgo . This galaxy was discovered by French astronomer Charles Messier on February 19, 1771 . Messier 49 is positioned 4.1° west-southwest of the star Epsilon Virginis . [ 2 ] 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 is emitting roughly 10 53 erg of energy. [ 3 ] The nucleus of this galaxy is emitting X-rays, suggests the likely presence of a supermassive black hole with an estimated mass of 5.65 × 10 8 solar masses , or 565 million times the mass of the Sun. [ 4 ] X-ray emissions shows a structure to the north of Messier 49 that resembles a bow shock .
Messier 49
Question Mark Galaxy, [ 2 ] Rosse's Galaxy, [ 2 ] M 51a, [ 2 ] NGC 5194, [ 2 ] UGC 8493, [ 2 ] PGC 47404, [ 2 ] VV 001a, [ 2 ] VV 403, [ 2 ] Arp 85 [ 2 ] See also: Galaxy , List of galaxies The Whirlpool Galaxy (also known as Messier 51a , M51a , or NGC 5194 ) is an interacting [ 6 ] grand-design [ 7 ] spiral galaxy that is estimated to be 23 ± 4 million light-years from the Milky Way Galaxy . [ 3 ] in the constellation Canes Venatici . It is one of the most famous galaxies in the sky. [ 8 ] The galaxy and its companion ( NGC 5195 ) are easily observed by amateur astronomers , and the two galaxies may even be seen with binoculars . [ 9 ] The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understand galaxy structure (particularly structure associated with the spiral arms ) and galaxy interactions. Sketch of M51 by Lord Rosse (William Parsons) in 1845.
Messier 51a
Messier 59 and the nearby elliptical galaxy Messier 60 were both discovered by Johann Gottfried Koehler in April 1779 during observations of a comet in the same part of the sky. [ 4 ] Charles Messier listed both in the Messier Catalogue about three days after Koehler's discovery. [ 4 ] ^ R. W. Sinnott, ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L.
Messier 59
Messier 105
Messier 105 (also known as M105 and NGC 3379 ) is an elliptical galaxy in the constellation Leo . Messier 105 is known to have a supermassive black hole . [ edit ] History Messier 105 was discovered by Pierre Méchain on 24 March 1781 , just a few days after he discovered the nearby galaxies Messier 95 and Messier 96 . [ 3 ] This galaxy is one of several that were not originally included in the original Messier Catalogue compiled by Charles Messier . Messier 105 was included in the catalog only when Helen S.
Milky Way
The Milky Way is the galaxy that contains the Earth . [ 10 ] [a] This name derives from its appearance as a dim "milky" glowing band arching across the night sky, in which the naked eye cannot distinguish individual stars.
Location of Alpha Centauri in Centaurus Alpha Centauri ( α Centauri , α Cen; also known as Rigil Kentaurus , Rigil Kent / ˈ r aɪ dʒ əl / , or Toliman ) is the brightest star in the southern constellation of Centaurus . Although it appears to the unaided eye as a single object, Alpha Centauri is actually a binary star system (designated Alpha Centauri AB or α Cen AB ) whose combined visual magnitude of -0.27 would qualify it as the third single brightest star in the night sky after -0.72 magnitude Canopus . Its individual component stars are named Alpha Centauri A (α Cen A), with 110% of the mass and 151.9% the luminosity of our Sun , and Alpha Centauri B (α Cen B), at 90.7% of the Sun's mass and 50.0% of its luminosity.
Alpha Centauri
The Sun is the star at the center of the Solar System . It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields . [ 10 ] [ 11 ] It has a diameter of about 1,392,000 km, about 109 times that of Earth , and its mass (about 2 × 10 30 kilograms, 330,000 times that of Earth) accounts for about 99.86% of the total mass of the Solar System. [ 12 ] Chemically, about three quarters of the Sun's mass consists of hydrogen , while the rest is mostly helium .
Sun
Mercury is the innermost of the eight planets in the Solar System . It is also the smallest, and its orbit has the highest eccentricity of the eight. [ a ] It orbits the Sun once in about 88 Earth days, completing three rotations about its axis for every two orbits. Mercury has the smallest axial tilt of the Solar System planets.
Mercury
Venus is the second planet from the Sun , orbiting it every 224.7 Earth days. [ 10 ] The planet is named after Venus , the Roman goddess of love and beauty.