It has a visual magnitude of 13.2 and a diameter of 2.2 arc minutes. The constellation of Pegasus isn’t just full of mesmerizing deep-sky objects, but its greatest asterism, the Great Square of Pegasus, can also be used as a guide towards finding many more famous deep-sky objects, such as the Andromeda Galaxy. The blue specks in the spiral arm at the top of NGC 7319 and the red dots just above and to the right of the core are clusters of many thousands of stars. The name Delta Pegasi has long been retired and the star is now known only as Alpha Andromedae, or by its proper name, Alpheratz. It is named after the winged horse Pegasus, from Greek mythology, and it is one of the oldest Greek constellations. The Great Square of Pegasus and its stars can be used to find several interesting and famous deep-sky objects. Enif is an evolved K-type orange-hued star, that has entered the supergiant stage. Polydectes wanted Danaë for himself and Perseus stood in his way because he defended his mother from the king’s advances. It has an apparent magnitude of 11.9. The most famous myth involving Pegasus is the one of Bellerophon, the hero who was sent by King Iobates of Lycia to kill the Chimaera, a monster that breathed fire and was devastating the king’s land. Beta Pegasi has an apparent magnitude of 2.42 and is about 196 light years distant. Bellerophon found Pegasus and tamed him using a golden bridle given to him by the goddess Athena. Stephan’s Quintet is a group of five galaxies, NGC 7317-7320, first discovered by the French astronomer Édouard Stephan at Marseilles Observatory in 1877. It has an apparent magnitude of 14.1. The stars are generally second and third magnitude. Mythology of the constellation Pegasus. But he didnt do it by himself: he had a lot of help from Athena. Studies have shown that group member NGC 7320, at upper left, is actually a foreground galaxy about seven times closer to Earth than the rest of the group.Three of the galaxies have distorted shapes, elongated spiral arms, and long, gaseous tidal tails containing myriad star clusters, proof of their close encounters. 51 Pegasi was the first star ever discovered that was similar to the Sun and had a planet in its orbit. The primary star, Matar, has around 351% of our Sun’s mass, 2,451% of its radius, and it is 330 times brighter than our Sun. The giant is however cooler than our Sun, having temperatures of around 3,650 K. Phi Pegasi and Psi Pegasi are pulsating red giant stars located at around 460 light-years, and 480 light-years respectively. In Greek mythology, Pegasus is a white winged horse that sprang from the neck of the Gorgon Medusa when Perseus beheaded her. It has an apparent magnitude of 13.8, and it was discovered since 1872 by Edouard Stephan. This galaxy is seen edge-on from Earth, and thus it is often referred to as the “little sombrero galaxy”, a miniature version of Messier 104 – the Sombrero Galaxy. Pegasus is a prominent constellation in the northern sky, named after a winged horse in Greek mythology. The Great Square of Pegasus represents the main body of Pegasus. Pegasus is a white-colored winged horse in Greek mythology. Pegasus constellation lies in the northern hemisphere. Bellerophon then rode Pegasus into the sky, and swooped down on the Chimaera, killing the monster with his arrows and lance. Enif’s spectrum shows an overabundance of the elements strontium and barium, which may be the result of the S-process of nucleosynthesis in the outer atmosphere of the star. It has several rings of stars of which the outermost is most prominent and contains most of the gas and star forming activity in NGC 7217. The star is classified as a slowly pulsating B star with slight variations in luminosity. Stephan’s Quintet, as the name implies, is a group of five galaxies. The star is also classified as a Gamma Doradus variable – its luminosity changes due to non-radial pulsations on its surface, and it is also a Vega-like star – having excess infrared emission caused by a circumstellar disk. It is 1.9’x1.4′ in size and has an apparent magnitude of 11.9. Its brightest star is Enif (from the Arabic for “the nose”), with a magnitude of 2.4. Pegasus’s location in the northern hemisphere means that the whole constellation is visible to observers north of 53o S, and it is best viewed during the month of October. According to legend, the horse had magical powers, his hooves could dig out a spring, for example. It has a period of 22.952± 0.804 hours and completes 1.04566 cycles per day. Notoriously wild and free-roaming, Pegasus was finally tamed by one of the greatest Greek heroes, Bellerophon. The galaxy was discovered by the German-born British astronomer William Herschel in 1784. The constellation was named after Pegasus, the winged horse in Greek mythology. Before the Greeks were telling tales of Pegasus, ancient Babylonian … Medusa was a beautiful woman before she was cursed by the goddess Athena after she was defiled by the sea god Poseidon, in Athena’s temple. This star is a semi-regular variable type of star, having brightness variations between magnitude 2.31 and 2.74 within a period of 43.3 days. NGC 7814 is a spiral galaxy in Pegasus seen edge-on. It is classified as a Seyfert galaxy undergoing star forming activity in the core and outer spiral arms. Origin: One of the 48 Greek constellations listed by Ptolemy in the Almagest. It has a visual magnitude of 2.95 and is the fifth brightest star in the constellation. There, Zeus used the horse to carry his thunder and lightning, and eventually placed him among the constellations. It is 12 times more massive than the Sun, about 5000 times more luminous, and it has 185 times the Sun’s radius. This drama is being played out against a rich backdrop of faraway galaxies. Alkarab, designated as Upsilon Pegasi, is an F-type yellow-white aging giant star, located at around 170 light-years away from us. Astronomers think that particularly dense globulars, like this one, underwent a process called core collapse, in which gravitational interactions between stars led to many members of the cluster migrating towards the centre. It is also a fast-spinning star, having a rotational velocity of 140 km / 86.9 mi per second. The Story of Perseus Take a look at the story of how Perseus slew Medusa, the mother of Pegasus, and rescued Andromeda, the daughter of Cepheus and Cassiopeia, from the sea monster Cetus. It has an apparent magnitude of 11.6. The brighter component is a main sequence star belonging to the spectral class A8m. Astronomers think that the radio jet in NGC 7479 was put into its bizarre backwards spin following a merger with another galaxy. NGC 7320 is a spiral galaxy located at around 39 million light-years away from us. It is 0.4’x’.4’ in size. Matar, designated as Eta Pegasi, is the fifth brightest star in Pegasus, having an apparent magnitude of +2.95. Global warming, sea level rise, increased frequency and intensity of storms. This galaxy’s arms, dust, and gas have been highly disturbed due to the interaction of the other galaxies which are members of the Quintet. There are plenty of interesting bright stars in Pegasus, among them, the supergiant star Enif, which is the brightest star in Pegasus, the second-brightest star which is a red giant, Scheat, the third-brightest, Markab which is an A-type subgiant star, the fourth-brightest in Pegasus, Algenib which is a subgiant star, the red dwarf and white dwarf star system designated as AG Pegasi, the pulsating Phi, and Psi Pegasi red giants, the white star Salm, or the first discovered Sun-like star to host an exoplanet, 51 Pegasi, among many others. NGC 1, also designated as GC 1, or UGC 57, is an intermediate spiral galaxy located at around 211 million light-years away from us. This means that it is an orange supergiant. Sadalbari has exhausted the fuel in its core, and it has started to expand. The origin of the meteor shower is most likely the C/1979 Y1 (Bradfield) comet, which has an orbital period of 300 years. NGC 7673, image: Hubble Space Telescope, NASA, ESA. When Perseus killed Medusa, Pegasus and the warrior Chrysaor sprang from her neck, both of them offspring of Poseidon. He did not expect the hero to come back from his mission alive. This spring was named Hippocrene, which means “the horse’s fountain”. The star is cooler than our Sun, having temperatures of around 4,898 K. Pi2 Pegasi has an apparent magnitude of +4.28, and it is getting fainter since it is drifting further away from us with a speed of around +5 km / +3.1 mi per second. It was first catalogued by the Greek astronomer Ptolemy in the 2nd century. It is about 1500 times more luminous than the Sun. NGC 7319, at top right, is a barred spiral with distinct spiral arms that follow nearly 180 degrees back to the bar. NGC 7331 has a diameter of around 120,000 light-years. The brightest galaxy in the group is NGC 7320, which is only 40 million light years distant. Zeta Pegasi is a main sequence star of the spectral type B8 V. It has an apparent magnitude of 3.414 and is about 204 light years distant from the Sun. Its main geometrical figure is the "Great Square of Pegasus." NGC 7673 is a disturbed spiral galaxy with a visual magnitude of 13.2, about 1.3’x1.2′ in size. Pegasus was a winged horse in ancient Greek mythology . Pegasus is a magnificent constellation occupying more than 1200 square degrees in the sky. It has a few million years left to live, though it isn’t clear if it will explode as a supernova or die off as a rare neon-oxygen white dwarf, due to its mass straddling the dividing line between stars destined to explode or not. The Andromeda Galaxy, also designated as Messier 31, can be found between the Great Square and Cassiopeia’s W asterism. Its projected Galactic orbit carries it between 18,600 and 26,300 light-years from the center of our galaxy. There is one meteor shower associated with Pegasus; the July Pegasids. NGC 7331 was discovered in 1784 by the famous astronomer, William Herschel. The resulting stream which flowed from the spot he had pawed became sacred to the Muses. Matar is a binary star system, with the primary star being a G-type giant star, while the second is an F-type main-sequence star. The constellation was named after Pegasus, the winged horse in Greek mythology. His mother was the dreadful monster, Medusa. NGC 7319 is a spiral galaxy approximately 360 million light years distant. Sadalbari has around 270% of our Sun’s mass, 960% of our Sun’s radius, and it is cooler than our Sun, with temperatures of only around 4,950 K. Salm, designated as Tau Pegasi, is an A-type main-sequence star located at around 162 light-years away from us. Apart from the aforementioned Messier 15 globular cluster, some other deeps-sky objects that reside in the constellation of Pegasus are the spiral galaxy NGC 7331, the Seyfert galaxy NGC 7742, the quasar nicknamed as Einstein’s Cross, the Stephan’s Quintet – which is a cluster of galaxies, NGC 7725 and NGC 7753, which are a pair of colliding galaxies, the unbarred spiral galaxies NGC 7217, and NGC 742, the elliptical galaxy NGC 7315, or another pair of colliding galaxies, NGC 7318a and NGC 7318b, among many other objects. Scheat, designated as Beta Pegasi, is the second-brightest star in the constellation of Pegasus, and the second-brightest star in the Great Square asterism, having an apparent magnitude of 2.42. In Chinese astronomy, the modern constellation of Pegasus lies in the Black Tortoise of the north – where the stars were classified in several separate asterisms of stars. Pegasus is located in the fourth quadrant of the northern hemisphere (NQ4), and it can be seen at latitudes between +90o and -60o. The discovery shook the assumption that a ‘high redshift’ in a quasar’s light spectrum meant that the quasar was one of the fastest receding objects in the universe, which in turn meant that it was billions of light years distant from Earth. Asterisms are groups of stars that form simple patterns but are part of one or more constellations. In this galaxy, Hubble can resolve individual stars, evidence that NGC 7320 is closer to Earth. Take an interactive tour of the solar system, or browse the site to find fascinating information, facts, and data about our planets, the solar system, and beyond. Most of the quintet is too far away even for Hubble to resolve individual stars. Its brightest star is Mirfak ("elbow" in Arabic), but its most famous star is Algol, better known as the Demon Star. The galaxy NGC 7320 appears in the line of sight of Stephan’s Quintet, and since it is closer to us than the rest, it appears brighter, however, it is unrelated to the group. When he was born, Pegasus flew away to Mount Helicon in Boeotia, where the Muses lived, and he befriended them. After this huge success and other heroic deeds performed for King Iobates, Bellerophon began to believe he was entiltled to join the gods on Mount Olympus. Continuing clockwise, the next galaxy appears to have two cores, but it is actually two galaxies, NGC 7318A and NGC 7318B. Eventually, Pegasus became the horse of another legendary Greek hero, Bellerophon, who was asked to kill the Chimera and succeeded with the help of Athena, and Pegasus. Image courtesy of Pixabay. The star, HD 209458, is only 14% more massive, and 20% bigger than our Sun. The galaxy is also notable for a number of stars that rotate in the opposite direction to the majority around the galaxy’s core, and for having two quite distinct groups of stars, the young, metal-poor population on the outermost regions and stars of intermediate age on the innermost ones. These meteors move fast, however, at around 70 km / 43.4 mi per second. These stars are less than 10 million years old and have not yet blown away their natal cloud. Algenib is a subgiant star of the spectral type B2 IV. NGC 7320 has large H II regions where intense star formation is taking place. The galaxy is not part of the Hickson Compact Group, but is located in the same line of sight as the other four galaxies. The constellation of Pegasus is bordered by the constellations of Andromeda, Aquarius, Cygnus, Delphinus, Equuleus, Lacerta, Pisces, and Vulpecula. Sharply contrasting with these galaxies is the dwarf galaxy NGC 7320 at upper left. The paired fish of the constellation Pisces, that in myth were caught by Dictys the fisherman who was brother of Polydectes, king of Seriphos, the place where Perseus and his mother Danaë were stranded. NGC 7742, also known as the Fried Egg Galaxy, is a face-on unbarred spiral galaxy located at around 72.4 million light-years away from us. Pi2 Pegasi has around 248% of our Sun’s mass, 850% of its radius, and it is 102.9 times brighter than our Sun. It varies from 0.7 to 3.5 in magnitude. Bellerophon found Pegasus and tamed him using a golden bridle given to him by the goddess Athena. After this and several other heroic deeds for King Iobates, Bellerophon let the successes get to his head. It has an apparent magnitude of 10.4. Pegasus, in Greek mythology, a winged horse that sprang from the blood of the Gorgon Medusa as she was beheaded by the hero Perseus. Then he swooped down on the Chimaera from the sky and killed the monster with his lance and arrows. It is 3.9’x3.2′ in apparent size and lies approximately 50 million light years from Earth. It was named by the winged ancient horse from Greek mythology.Pegasus contains 8 bright stars and its known planets and they are shaped like a body and head of a horse. Sadalbari, designated as Mu Pegasi, is a giant G-type star, located at around 106.1 light-years away from us. It has an apparent magnitude of 11.6 and is located about 105 million light years away in Pegasus. Homam, designated as Zeta Pegasi, is a bright star located at around 204 light-years away from our Solar System. It is located in the fourth quadrant of the northern hemisphere (NQ4) and can be seen at latitudes between +90° and -60°. The magnitude 9 star, AG Pegasi, is classified as a symbiotic nova, having undergone one extremely slow nova outburst in 1885, when it reached magnitude 6, and a smaller outburst. The Propeller Galaxy, designated as NGC 7479, or Caldwell 44, is an unbarred spiral galaxy located at around 105 million light-years away from us. We know the constellation above isn’t accurate, but we didn’t feel right turning our beloved winged horse upside down. NGC 7814, also known as Caldwell 43, or UGC 8, is a spiral galaxy located at around 40 million light-years away from us. Some of the stars that mark the celestial horse, Pegasus, are Enif – which marks the horse’s muzzle, Homam, Xi Pegasi, Rho Pegasi, and Sigma Pegasi, which mark the horse’s neck, Matar and Omicron Pegasi mark the left knee and Pi Pegasi the left hoof, while Iota Pegasi and Kappa Pegasi mark the right knee and hoof. It is located at 23 hours right ascension and 20° north in declination. Riding Pegasus, he tried to fly to Olympus and join the gods. It is located at around 167 light-years away from Earth. According to Pindar, one of the most celebrated Ancient Greek poets, the goddess gifted him with a charmed golden bridle, which Bellerophon used to capture Pegasus when the stallion was drinking water at the Pierian spring, another water source associated with Pegasus and the Muses. The neighboring constellations are Andromeda, Aquarius, Cygnus, Delphinus, Equuleus, Lacerta, Pisces and Vulpecula. The lensing effect is a result of spacetime around massive objects such as black holes or galaxy clusters being curved, which allows rays of light from a source located in the background to be bent. Coordinates have shifted since and this is no longer the case. It was the first deep sky object to be entered in the New General Catalogue (NGC). The world of constellations. 51 Pegasi is only 11% more massive than our Sun, and its radius is only 23% greater than our Sun’s. 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