Some astronomers suspect that Mayall II is not a true globular cluster, but the remaining core of a dwarf galaxy that was consumed by the larger M31. The Blue Snowball Nebula (or simply Snowball Nebula) is catalogued as NGC 7662 in the New General Catalogue. Then, a young astronomer named Edwin Hubble took a look at it through the 2.5-meter Hooker telescope at Mount Wilson in California. At 2.5 million light-years, the Andromeda Galaxy is the closest spiral galaxy to the Milky Way. The primary star is a class K bright giant. Ross-248 (Gliese 905) is the 10th closest star to Earth at 10.3 light years. NGC 90 is located at a distance of 333.8 million light years and NGC 93 is 259.7 million light years away. This category only includes cookies that ensures basic functionalities and security features of the website. Its mass is estimated to be roughly equal to that of the Milky Way Galaxy, with which it is expected to collide in about 4.5 billion years. The boundary of the Andromeda constellation contains 19 stars that host known exoplanets. The two stars orbit each other with a period of 96.7 days.
Its brightness varies between magnitude 10.3 and 14 over a period of 14 days. It is a multiple star system. It is shared with Pegasus, although it's not formally part of that constellation. The Arabic astronomers saw "Al Hut" — a fish. The fainter companion star, Gamma2 Andromedae, is itself a binary star, consisting of fifth and sixth magnitude white dwarf stars. Andromeda Constellation has four bright stars and numerous dimmer stars. Andromeda has three stars brighter than magnitude 3.00 and three stars located within 10 parsecs (32.6 light years) of Earth. Upsilon Andromedae is 44 light years distant. Mirach, Beta Andromedae, has roughly same apparent magnitude as Alpheratz, as it varies from +2.01 to +2.10.
The cloud contains a number of very bright stars and is located in a zone free of neutral hydrogen in one of Andromeda’s spiral arms. NGC 67a is also an E5-type elliptical galaxy. In the story, it was the goddess Athena who commemorated the princess Andromeda by placing her image among the stars, next to the constellations representing her husband Perseus and mother Cassiopeia. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. He observed Cepheid variable stars in Andromeda and used Henrietta Leavitt's "period-luminosity" relation to determine their distance.
It occupies an area 13’.5 x 2’.5 in size. We also use third-party cookies that help us analyze and understand how you use this website. Later, "parsec" was developed for truly huge distances. It is 300 million light years distant and spans 80,000 light years, or 0.9’ x 0.8’ of the apparent sky. In ancient China, stargazers saw various figures of legend in Andromeda's stars, including a famous general and palaces for their emperors. NGC 74 is a spiral galaxy that spans 65,000 light years. M32 is about 6,500 in diameter and mostly contains old stars, with no star formation going on inside the galaxy. It is 1,900 times more luminous than the Sun and 3-4 times more massive. Andromeda has a number of stars with confirmed exoplanets. Image: Michael Rich, Kenneth Mighell, and James D. Neill (Columbia University), and Wendy Freedman (Carnegie Observatories) and NASA. It is believed to contain an intermediate-mass black hole in its centre. It appears as our own galaxy, the Milky Way, would appear seen edge-on. The galaxy was discovered by William Herschel in 1784. NGC 7686 is an open cluster with an apparent magnitude of 5.6. The two components are designated GX Andromedae (Groombridge 34 A) and GQ Andromedae (Groombridge 34 B). It was catalogued by Caroline Herschel’s brother William Herschel in 1786. Along with Messier 110, Messier 32 is the closest bright elliptical galaxy to our solar system. The second-brightest star in Andromeda is called Mirach, or β Andromedae. Mirach and NGC 404, The Ghost of Mirach, photo by NASA. HD 8673 (F7 V) has a substellar companion, detected in 2005, that could either be a brown dwarf or a planet. You also have the option to opt-out of these cookies. Andromeda is the largest of the group.
Adhil, or Xi Andromedae, is also a double star. The galaxy was independently discovered by Caroline Herschel a decade later.
A smaller cluster can be seen superimposed on the group that includes AGC 102760, UGC 152, and UGC 166. Andromeda is visible to all northern hemisphere viewers and many, but not all, viewers south of the equator. R Andromedae is a Mira-type variable star that appears about four degrees southwest of the Andromeda Galaxy. The night skies of September and October herald the return of the constellation Andromeda. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Constellations of Andromeda and Triangulum (lower right) from Urania's Mirror (.
It was designated SN 1986J and peaked at magnitude 14.
While initially thought to look like our own Milky Way if seen from the side, more detailed surveys revealed the existence of filaments of dust and gas escaping the plane of the galaxy into the halo over hundreds of light-years. It occupies an area 1.7’ x 1.4’ in size. It lies at a distance of only 10.30 light years from Earth. Only the brightest central region of the Andromeda Galaxy is visible through a small telescope but, in a larger telescope, the Andromeda Galaxy is about six times as wide as the full Moon.
It will appear to be facing you "edge-on.". It has an apparent magnitude of +3.86.
It has a visual magnitude of 14.7 and is 287 million light years distant. Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy and remains one of the 88 modern constellations. The galaxy has an apparent magnitude of 13.2. Messier 110, Atlas Image courtesy of 2MASS/UMass/IPAC-Caltech/NASA/NSF. Alpheratz is a binary star located less than 100 light-years away from us.
It is also known as the Chained Maiden, Persea (wife of Perseus), or Cepheis (daughter of Cepheus). The Blue Snowball Nebula (NGC 7662) in Andromeda, image: Judy Schmidt. Our editors will review what you’ve submitted and determine whether to revise the article. It has an apparent size of 0.3’ x 0.3’ and an actual size of 25,000 light years.
Pi Andromedae is another binary star, approximately 660 light years distant.
This one is associated with ancient Babylonian astronomy but found by Ptolemy in the 2nd century CE (was part of then known 48 constellations). By lighting up when they are born, or exploding when they die, stars cause powerful winds that can blow dust and gas over hundreds of light-years in space. NGC 69 is a lenticular (S0) galaxy with an apparent magnitude of 14.7. Andromeda is located directly next to Cassiopeia, and is also connected to a boxy shape of stars that make up the constellation Pegasus. It is located 22 arcminutes south of Andromeda’s central region. Because of its northern decli… Andromeda is most prominent during autumn evenings in the Northern Hemisphere, along with several other constellations named for characters in the Perseus myth.
The Triangulum Galaxy (M33), the famous spiral galaxy in the constellation Triangulum, is also believed to be a satellite of the Andromeda Galaxy. Mirach is located only seven arcminutes from the galaxy NGC 404. She previously worked on a Hubble Space Telescope instrument team.
It is located at a distance of 308 light years and has a visual magnitude of 14.7. The official IAU chart outlines the area that contains Andromeda constellation. The NASA/ESA Hubble Space Telescope turned its powerful wide field Advanced Camera for Surveys towards this spiral galaxy and took this close-up of its northern half. NGC 891 is part of a small group of galaxies bound together by gravity. The brightest is called α Andromedae, or Alpheratz. Necessary cookies are absolutely essential for the website to function properly. Mirach is part of an asterism called the girdle. It is 900 light years distant.
It is both less massive and less luminous than the Sun.
Andromeda constellation is attached to Pegasus the flying horse in the sky. Alpheratz, photo by Stockholm Observatorium.
Visible in the constellation of Andromeda, NGC 891 is located approximately 30 million light-years away from Earth. Andromeda is represented in the Northern sky by the constellation Andromeda, which contains the Andromeda Galaxy. Other stars with known planets are HD 222155 (G2V), HD 16175 (F8 IV), HD 1605 (K1IV, two exoplanets), HD 13931 (G0), HD 5583 (K0), HD 15082 (kA5 hA8 mF4), HAT-P-6 (F), HAT-P-16 (F8), HAT-P-32 (F/G), WASP-1 (F7V), Kepler-63, HAT-P-19 (K), HAT-P-28 (G3) and HAT-P-53. The constellation of Andromeda, the Daughter of Cepheus, is best viewed in Fall during the month of November.
The star is located 97 light years from Earth.
It is often classified as a dwarf spheroidal galaxy. The cluster was named after the American astronomer Nicholas Mayall, who discovered it with O.J. The brighter component is a K-type giant, while the dimmer companion is either a G-type main sequence star or a white dwarf. V428 Andromedae (HD 3346, spectral class K5III) has two suspected exoplanets, detected in 1996. When the king sought advice from the Oracle of Ammon on how to prevent complete destruction of his lands, he was told that the only way to appease the gods and nymphs was to sacrifice his daughter to Cetus. Andromeda, in astronomy, constellation of the northern sky at about one hour right ascension and 40° north declination. The constellation of Andromeda is best known for the Andromeda Galaxy, M31, one of the most famous objects in the sky, which can most easily be …
Messier 32, a dwarf elliptical galaxy approximately 2.65 million light years distant, was originally discovered by the French astronomer Guillaume Le Gentil in 1749. NGC 71 is either an elliptical or lenticular galaxy (E5/S0) about 130,000 light years across, located about 310 million light years from the Sun. NGC 752 (Caldwell 28) is an open cluster with an apparent magnitude of 5.7, located at a distance of 1,300 light years from Earth. Messier 32 was the first elliptical galaxy ever discovered. Andromeda is the 19th largest constellation in the sky, occupying an area of 722 square degrees.
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