It is located in the second quadrant of the northern hemisphere (NQ2) and can be seen at latitudes between +90° and -30°. There is an entirely different Greek myth associated with Ursa Major, the one about Adrasteia. It has an apparent magnitude of 9.9. When it was discovered, Groombridge 1830 was the star with the highest proper motion of any star known. Mu Ursae Majoris has a visual companion about 1.5 AU away. Winnecke 4 is another double star in Ursa Major. A type Ia supernova (a violent explosion of a white dwarf star), SN 2011fe, was observed in the galaxy in August 2011. At the sight of the bear, Arcas quickly drew his spear, scared. Legend: α UMa (Dubhe), β UMa (Merak), γ UMa (Phecda), δ UMa (Megrez), ε UMa (Alioth), ζ UMa (Mizar), η UMa (Alkaid) and α Ursae Minoris (Polaris), image: Alex Zelenko. The star’s traditional name, Muscida, means “the muzzle.”. Its name means “the great bear,” or “the larger bear,” in Latin. A type 2 supernova, 1969B, was observed in M108 in 1969. There were numerous songs that spread among slaves in the south that said to follow the ‘Drinking Gourd’ to get to a better life. So far it has been the only supernova observed in M109. Arab, UK, USA, India, Europe, OSN, BEIN, Sky, Sports, Entertainment, Movies, Series. If you follow the imaginary line from Merak to Dubhe and continue the arc, you will eventually reach the Northern Star. Keep track of what movies you have seen. There is another binary system about 90,000 AU away from the main pair, which makes Alpha Ursae Majoris a four star system. Gamma Ursae Majoris is the lower left star in the bowl of the Big Dipper. It belongs to the spectral class G4 II-III, which means that it is somewhere between a giant and bright giant on the evolutionary scale. One day, her son Arcas was walking in the forest and the two came face to face. Like the other notable galaxies in Ursa Major, M109 was discovered by Pierre Méchain in 1781. Like Dubhe, Alkaid does not belong to the Ursa Major Moving Group. However, it was Zeus’ jealous wife Hera, who was not amused by her husband’s philandering, who would do even more damage. Bode originally described them both as nebulous patches. NGC 5474 is the closest companion to M101. Similarly, the imaginary line that stretches along the handle of the Dipper leads to the bright star Arcturus, the bear keeper, located in the constellation Boötes, the Herdsman. Ursa Major constellation lies in the northern sky. It has a visual magnitude of 3.01 and is about 144.5 light years distant. The galaxy is often classified as a dwarf spiral galaxy because it shows signs of a spiral structure. The star’s traditional name, Phecda (or Phad), is derived from the Arabic phrase fakhð ad-dubb, which means “the thigh of the bear.”. Artemis does this to punish the nymph for breaking her vow of chastity to the goddess. The nebula was first discovered by the French astronomer Pierre Méchain in 1781. It was one of the constellations catalogued by the Greek astronomer Ptolemy in the 2nd century. Both stars belong to the spectral class F8V. Halo stars are typically metal-poor, because they were created in an earlier age of the galaxy. The distance between the two has decreased dramatically since, and is now only 4.5 arc seconds. It also contains 13 stars with confirmed planets. These include the Pinwheel Galaxy (M101), Bode’s Galaxy, the Cigar Galaxy, and the Owl Nebula. It has an apparent magnitude of 1.76 and is approximately 81 light years distant. iCheckMovies helps you keep a personal list of movies you have seen and liked.It's fun and easy to use, whether you're a movie geek or just a casual watcher. This only further infuriated Hera and she persuaded her foster parents Oceanus and Tethys never to let the bear bathe in the northern waters. It has significance in many different cultures. films en VF ou VOSTFR et bien sûr en HD. The Pinwheel Galaxy is about 170,000 light years in diameter, which makes it about 70 percent larger than the Milky Way galaxy. This, according to the legend, is why Ursa Major never sets below the horizon in mid-northern latitudes. The galaxy is similar to our Milky Way, but our favorable view provides a better picture of the typical architecture of spiral galaxies. Xi Ursae Majoris is composed of two main sequence dwarfs belonging to the spectral class G0 Ve. Ursa Major is associated with many different forms in the sky in different cultures, from the camel, shark and skunk to the sickle, bushel and canoe. Charles Messier included it in his catalogue two years later. The resulting huge concentration of young stars carved into the gas and dust at the galaxy’s center. It got its name because of its appearance of owl-like eyes when observed through a large telescope. It is the second brightest star in Ursa Major. The term “dwarf galaxy” may sound diminutive, but don’t let that fool you — NGC 5474 contains several billion stars! 47 Ursae Majoris is a main sequence star belonging to the spectral class G1V. The star names approved by the International Astronomical Union (IAU) are Alcor, Alioth, Alkaid, Alkaphrah, Alula Australis, Alula Borealis, Aniara, Chalawan, Dombay, Dubhe, Intercrus, Liesma, Megrez, Merak, Mizar, Muscida, Násti, Phecda, Taiyangshou, Talitha, Tania Australis, and Tania Borealis. Amaltheia, the goat that nursed Zeus, was placed in the sky as the bright star Capella in the constellation Auriga. The name Dubhe comes from the Arabic dubb, which means “bear,” from the phrase żahr ad-dubb al-akbar, or “the back of the Greater Bear.” Dubhe does not belong to the Ursa Major Moving Group. There are two meteor showers associated with the constellation; the Alpha Ursa Majorids and the Leonids-Ursids. It was originally catalogued as a Messier object by Charles Messier in 1764, while he was looking for a nebula that Johann Hevelius reported seeing in the region. Artemis had already banished Callisto when she had learned about the nymph’s pregnancy and broken vow. The apparent magnitude of the system varies between 7.75 and 8.48. The Big Dipper is one of the most recognizable asterisms in the sky. Groombridge 1830 is a subdwarf belonging to the spectral class G8V, only 29.7 light years from the Sun. It is 14 times more luminous than the Sun and has 63% more mass. The Cigar Galaxy is believed to have had at least one tidal encounter with the neighbouring Messier 81 and, as a result, a large amount of gas ended up funneled into its core in the last 200 million years. Both Mizar and Alcor belong to the Ursa Major Moving Group. Messier 109 (NGC 3992), photo: Hewholooks. 05.26 0 강추 | 최대 10Gbps 로켓 다운로드.210526.720p-NEXT 05.23 1 [예능] 런닝맨.E556.210523.고화질.H264-F1RST 05.25 2 [예능] 개는 훌륭하다(아동학대 의심까지 받게 한 입질견).E79.210524.고화질.H264-F1RST 05.23 3 [게임] Sex Lady Sonia-DARKSiDERS 05.23 4 [예능] 뭉쳐야 쏜다(용인으로 간다).E16.210523.고화질-NEXT The stars are physically so close that their outer envelopes are in direct contact. Alkaid is notable for being one of the hottest stars that can be seen without binoculars. The galaxy has a visual magnitude of 10.7 and is approximately 45,000 light years distant. Kuntz (GSFC), F. Bresolin (University of Hawaii), J. Trauger (JPL), J. Mould (NOAO), and Y.H. Ursa Major is the third largest constellation in the sky, occupying an area of 1280 square degrees. Kappa Ursae Majoris is another binary star in Ursa Major, composed of two A-type main sequence dwarfs with visual magnitudes of 4.2 and 4.4. Though the galaxy is 11.6 million light-years away, NASA Hubble Space Telescope’s view is so sharp that it can resolve individual stars, along with open star clusters, globular star clusters, and even glowing regions of fluorescent gas. It has an apparent magnitude of 3.35. Each of the two main components in the Xi Ursae Majoris system is itself a spectroscopic double, and has a low mass companion. The Chinese know it as Tien Tsan or Ta Tsun, which means “extremely honourable.”. Iota Ursae Majoris is a star system composed of two double stars, a white subgiant of the spectral type A7 IV that is in fact a spectroscopic binary, and another pair of 9th and 10th magnitude stars. The RS Canum Venaticorum variables are close binary stars with large stellar spots caused by the stars’ active chromospheres. Nu and Xi Ursae Majoris are the first of three pairs of stars known to the ancient Arabs as the “leaps of the gazelle.”. The star’s traditional name, Tania Borealis, means “the Northern (star) of the Second (leap).”. In more recent American history, the Big Dipper played a role in the Underground Railroad, as its position in the sky helped slaves find their way north. It contains a number of large, bright H II regions, full of bright, hot newly formed stars. The name Merak comes from the Arabic al-maraqq, which means “the loins.”. A type Ia supernova, SN 1956A, was seen in the galaxy in 1956. Phecda’s estimated age is 300 million years. In Greek mythology, it is associated with Callisto, a nymph who was turned into a bear by Zeus’ jealous wife Hera. It has an apparent magnitude of 8.41. Two more planets were discovered in the system in 2002 and 2010. It dropped to third place with the discovery of Kapteyn’s Star in the constellation Pictor and Barnard’s Star in Ophiuchus. M108 contains about 290 globular clusters and 83 X-ray sources. Each star orbits the other during each orbital cycle, resulting in a decrease in brightness. Bode’s Galaxy was discovered by the German astronomer Johann Elert Bode in 1774. The two had a son, and named him Arcas. It has an apparent magnitude of 7.520 and cannot be seen by the naked eye. The seven stars that form the Big Dipper are Dubhe (Alpha Ursae Majoris), Merak (Beta UMa), Phecda (Gamma UMa), Megrez (Delta UMa), Alioth (Epsilon UMa), Mizar (Zeta UMa), and Alkaid (Eta UMa). Adrasteia was one of the nymphs who took care of Zeus when he was very young. M82 emits an infrared excess and is the brightest galaxy in the sky when observed in infrared light. Dubhe is a giant star belonging to the spectral class K1 II-III. M101 has five notable companion galaxies: NGC 5474, NGC 5204, NGC 5477, NGC 5585 and Holmberg IV. Xi Ursae Majoris is classified as an RS Canum Venaticorum type variable star. The name Alkaid itself means leader. However, when compared to the Milky Way with its hundreds of billions of stars, NGC 5474 does indeed seem relatively small. Rhea, Zeus’ mother, smuggled their youngest child to the island of Crete, where the nymphs Adrasteia and Ida nursed young Zeus for a year. The companion is a main sequence star that belongs to the spectral type F0 V. It completes the orbit around the brighter star every 44.4 years from a distance of 23 astronomical units. The star’s traditional name comes from the Arabic word alyat, which means “fat tail of a sheep.” Alioth is the star in the bear’s tail that is closest to the body of the bear. Alioth is the brightest star in Ursa Major and the 31st brightest star in the night sky. The smaller bear is represented by Ursa Minor. Consequently, star forming activity in the galaxy has increased tenfold compared to most other galaxies. Because of its relative proximity and brightness – it has an apparent magnitude of 6.94 – M81 is a popular target both for beginners and professional astronomers. Gamma UMa is a main sequence star of the spectral type A0 Ve. It is also known as Elkeid and Benetnash. Seeing the scene from Olympus, Zeus intervened to prevent disaster. Many years later, both Callisto and Arcas get captured in the forest and taken to King Lycaon as a gift. Since the constellation is pretty low in the sky in autumn, the legend says that it is the blood of the wounded bear that causes the leaves to turn red. Polaris, the North Star, is found by drawing a line from Merak (β) to Dubhe (α) and then extending it for five times the distance after Dubhe (α). It is difficult to distinguish when one lits the [grating] wires.”. The stars belonging to the group share common velocities in space and are believed to have a common origin. The two stars are sometimes known as the “Horse and Rider.”. It is also known as Saidak (“the test”), Suha (“neglected” or “forgotten”) and Arundhati in Indian cultures. The spots in turn cause variations in luminosity around 0.2 magnitudes. Its brightest stars form the Big Dipper asterism, one of the most recognizable shapes in the sky, also known as the Plough. It is 45.9 light years distant from Earth. Omicron Ursae Majoris is a multiple star system about 179 light years distant. It has an apparent magnitude of 5.03. The star’s traditional name, Alula Borealis, is derived from the Arabic word al-Ūlā, which means “the first (leap),” and the Latin word for “northern,” borealis. Callisto lived as a bear for the next 15 years, roaming the forest and always running and hiding from hunters. It was the first double star ever to be photographed. Its brightest stars form the Big Dipper asterism, one of the most recognizable shapes in the sky, also known as the Plough. The combined visual magnitude of the system is 3.79. Beta Ursae Majoris is 2.7 times more massive than the Sun, has 2.84 times the radius, and is about 68 times more luminous. It was among the last entries. It is a main sequence star of the spectral type A3 V. It has a visual magnitude of 3.312 and is approximately 58.4 light years distant from the solar system. The stars Alpha Coronae Borealis, Beta Aurigae, Delta Aquarii, Gamma Leporis and Beta Serpentis are stream members of the group. Throughout the galaxy’s center, young stars are being born 10 times faster than they are inside our entire Milky Way Galaxy. M108 is an isolated member of the Ursa Major Cluster, a galaxy cluster within the Virgo Supercluster. Early American photographer and inventor John A. Whipple and astronomer George P. Bond took the photo of the binary system in 1857 using a wet collodion plate and the 15-inch refractor telescope at Harvard College Observatory. Ursa Major is a well-known, significant constellation in many cultures. Ursa Major constellation lies in the northern sky. The star’s name, Megrez, is derived from the Arabic word al-maghriz, which means “the base” (as in, the base of the bear’s tail). As a result of the interactions between the galaxies, hydrogen gas has been stripped away from all three and gaseous filamentary structures have formed in the group. Alcor was discovered to be a binary system in 2009. It is a giant star belonging to the spectral type K3 III with a radius 57 times that of the Sun, and about 775 times the Sun’s luminosity. The fierce galactic superwind generated from these stars compresses enough gas to make millions of more stars. W Ursae Majoris is a prototype for a class of stars known as the W Ursae Majoris variables. The system has an apparent magnitude of 3.60 and is about 358 light years distant. It is a young main sequence star belonging to the spectral class B3 V, approximately 101 light years distant. Messier 82 is an edge-on starburst galaxy about 11.5 million light years from the solar system. The system is only 29 light years distant. The brightest star in the constellation is Alioth, Epsilon Ursae Majoris, with an apparent magnitude of 1.76. Like Kapteyn’s Star, Groombridge 1830 is a halo star, one that appears to be moving in the direction opposite to the galaxy’s rotation because it does not follow the rotation of the Milky Way. It is one of the oldest constellations in the sky, with a history dating back to ancient times. Xi Ursae Majoris, or Alula Australis, is the southern star of “the first leap.” It is in fact a star system first discovered by Sir William Herschel in 1780. The Big Dipper is also very useful in navigation as it points the way to Polaris, the North Star (Alpha Ursae Minoris), which is a part of another famous asterism, the Little Dipper in Ursa Minor constellation. Bode’s Galaxy – M81 (NGC 3031), photo: NASA, ESA – The spiral galaxy Messier 81 is tilted at an oblique angle on to our line of sight, giving a “birds-eye view” of the spiral structure. NGC 5474 is a peculiar dwarf galaxy in Ursa Major, located near the Pinwheel Galaxy (M101), with which it interacts. It has a surface temperature of 20,000 kelvins. Iota Ursae Majoris is approximately 47.3 light years distant from the solar system. Lambda Ursae Majoris is a star belonging to the spectral class A2 IV, which means that it is evolving into a giant as its hydrogen supply becomes exhausted. Most halo stars are located either far above or below the galactic plane and are believed to be at least 10 billion years old. The Owl Nebula is a planetary nebula about 2,600 light years away from the solar system. M82 was discovered by Johann Elert Bode on December 31, 1774, along with M81. It is the brightest galaxy in the M109 Group, a large group consisting of more than 50 galaxies in Ursa Major. Alkaid is the easternmost star in the Big Dipper asterism. The name Mizar is derived from the Arabic mīzar, which means “girdle” or “waistband.”. Alioth belongs to the spectral class A0pCr. The star is located only 8.55 light years away from the Mizar-Alcor star system. Messier 109 is another barred spiral galaxy in Ursa Major. Its name means “the great bear,” or “the larger bear,” in Latin. Alcor is a visual companion to Mizar. It belongs to the Ursa Major Moving Group. NGC 5474 itself is part of the Messier 101 Group. Xi Ursae Majoris is also notable for being the first binary star to have its orbit calculated, in 1828. Bode’s Galaxy is the largest of the 34 galaxies in the M81 Group, one of the groups of galaxies located in Ursa Major. It belongs to the Ursa Major Moving Group and is a suspected variable star. The Romans called the constellation Septentrio, or “seven plough oxen,” even though only two of the seven stars represented oxen, while the others formed a wagon. The galaxy can be seen about 10 degrees northwest of the star Dubhe (Alpha Ursae Majoris). Mizar, son compagnon, et Alcor vu par Camille Flammarion (1882) – Les étoiles et les curiosités du ciel, supplément de l’Astronomie populaire, Marpon et Flammarion, Paris, 1882. In a different version of the tale, it is not Hera but Artemis who transforms Callisto into a bear. Messier 81 is a bright, large spiral galaxy about 11.8 million light years distant from Earth. In about 19,900 years, it will come within 4.65 light years from the Sun. It is a binary system composed of two close stars in a circular orbit with a period of 0.3336 days. Angered by Zeus’ betrayal, she turned Callisto into a bear. Owl Nebula – Messier 97 (NGC 3587), photo: Jessica Barton, Faulkes Telescope North. Lalande 21185 is a red dwarf (spectral type: M2V) only 8.31 light years distant from the Sun. We would like to show you a description here but the site won’t allow us. Mu Ursae Majoris, or Tania Australis, is the southern star of the pair. Lalande 21185 is classified as a BY Draconis type variable and is a known X-ray source. The two components orbit each other with a period of 818 years. The star emits an excess of infrared radiation, which indicates a debris disk in its orbit. It was catalogued by the British astronomer Stephen Groombridge in the early 19th century in his Catalogue of Circumpolar Stars, published posthumously in 1838. The constellation Ursa Major contains 22 formally named stars. 1-290 完 18:12 시한부라서 흑막의 며느라가 되었는데 (完z) 18:12 (로판)여주인공의 오빠를 지키는 방법 1-209, 외전 1-40 完 From our perspective, the galaxy appears nearly edge-on. In spite of being the third brightest star in Ursa Major, Alkaid was designated Eta Ursae Majoris because Johannes Bayer named the stars of the Big Dipper from west to east, designating the pointer stars Alpha and Beta. If you follow the line further, you will find Spica, the brightest star in the constellation Virgo and also one of the brightest stars in the sky. They have highly eccentric orbits and a high space velocity. The grand design pattern of the Pinwheel Galaxy is suspected to be a result of the interaction between the galaxy and its companions. Zeus’ father Cronus was told by an oracle that one of his children would eventually overthrow him and, fearful of the prophecy, Cronus swallowed all his children until Zeus was born. Ursa Major is well-known in most world cultures and associated with a number of myths. The German astronomer Friedrich August Theodor Winnecke rediscovered the star in 1863, and it was subsequently named after him. It has an apparent magnitude of 7.86 and is 20.9 million light years distant from Earth. When the B component was first discovered in 1841, the two binary stars were separated by 10.7 arc seconds. Chu (University of Illinois, Urbana). The star is a solar analog; it has a similar mass and is slightly hotter than the Sun, with about 110 percent of the Sun’s abundance of iron. The star has six solar masses and is about 700 times more luminous than the Sun. The neighboring constellations are Boötes, Camelopardalis, Canes Venatici, Coma Berenices, Draco, Leo, Leo Minor and Lynx. In this version of the myth, Ida is associated with the constellation Ursa Minor. Ursa Major is the largest northern constellation and third largest constellation in the sky. Dubhe has an apparent magnitude of 1.79 and is 123 light years distant from the solar system. Regarder des films en streaming complet sur votre smart TV, console de jeu, PC, Mac, smartphone, tablette et bien plus. The constellation is referenced in Homer and the Bible. Live Channels from all around the world. Only one supernova has been discovered in it: SN 1993J, in March 1993. The estimated distance between the two stars is 1.1 light years. 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