The two had a son, and named him Arcas. Callisto lived as a bear for the next 15 years, roaming the forest and always running and hiding from hunters. One day, her son Arcas was walking in the forest and the two came face to face. At the sight of the bear, Arcas quickly drew his spear, scared. Seeing the scene from Olympus, Zeus intervened to prevent a tragedy.
In another version, Arcas becomes the constellation Ursa Minor. This only further infuriated Hera and she persuaded her foster parents Oceanus and Tethys never to let the bear bathe in the northern waters. This, according to the legend, is why Ursa Major never sets below the horizon in mid-northern latitudes.
In a different version of the tale, it is not Hera but Artemis who transforms Callisto into a bear. Artemis does this to punish the nymph for breaking her vow of chastity to the goddess. Many years later, both Callisto and Arcas are captured in the forest and taken to King Lycaon as a gift.
The mother and son take refuge in the temple of Zeus, and the god intervenes and saves them, placing them both in the sky. There is an entirely different Greek myth associated with Ursa Major, the one about Adrasteia. Adrasteia was one of the nymphs who took care of Zeus when he was very young. In this version of the myth, Ida is associated with the constellation Ursa Minor.
Amaltheia, the goat that nursed Zeus, was placed in the sky as the bright star Capella in the constellation Auriga. The prophecy eventually came true; Zeus overthrew Cronus and freed his brothers Hades and Poseidon and sisters Demeter, Hera and Hestia. 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.
In Hindu legend, the brightest stars of Ursa Major represent the Seven Sages and the constellation is known as Saptarshi.
In some Native American tales, the bowl of the Big Dipper represents a large bear and the stars that mark the handle are the warriors chasing it. 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. In more recent American history, the Big Dipper played a role in the Underground Railroad, as its position in the sky helped black people find their way north. Ursa Major is the third largest constellation in the sky, occupying an area of square degrees.
It also contains 13 stars with confirmed planets. The brightest star in the constellation is Alioth , Epsilon Ursae Majoris, with an apparent magnitude of 1. The constellation Ursa Major contains 22 formally named stars. There are two meteor showers associated with the constellation; the Alpha Ursa Majorids and the Leonids-Ursids. The Big Dipper is one of the most recognizable asterisms in the sky. It has significance in many different cultures. If you follow the imaginary line from Merak to Dubhe and continue the arc, you will eventually reach the Northern Star.
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. Alioth is the brightest star in Ursa Major and the 31st brightest star in the night sky. It has an apparent magnitude of 1. Alioth belongs to the Ursa Major Moving Group Collinder , a group of stars that includes most of the brightest stars in the constellation Ursa Major.
The stars belonging to the group share common velocities in space and are believed to have a common origin. Proctor, who realized that all stars of the Big Dipper with the exception of Alkaid and Dubhe have proper motions heading toward a common point in the constellation Sagittarius. Alioth belongs to the spectral class A0pCr.
Alioth exhibits fluctuations in its spectral lines with a period of 5. Dubhe has an apparent magnitude of 1. It is the second brightest star in Ursa Major. It is a spectroscopic binary star. The companion is a main sequence star that belongs to the spectral type F0 V.
It completes the orbit around the brighter star every There is another binary system about 90, AU away from the main pair, which makes Alpha Ursae Majoris a four star system. Beta Ursae Majoris is a main sequence star, approximately It belongs to the spectral class A1 V. The star has a debris disk of dust orbiting it, one with a mass 0. Ursa Major is located in the second quadrant of the northern hemisphere.
The best time to see this constellation is in the spring. At this time Ursa Major is high above the north-eastern horizon. The eight neighboring constellations to the Great Bear are Draco to the north and northeast. Canes Venatici to the east and southeast. Coma Berenices to the southeast. Leo and Leo Minor to the south. Lynx to the southwest and Camelopardalis to the northwest.
From southern temperate latitudes, the Big Dipper is unable to be seen. However, some of the southern parts of the constellation can be seen. The Great Bear is one of the oldest constellations in the night sky.
It can be dated back up to 13, years. It is mentioned in the Bible and also found in the works of the Greek author Homer. In Greek mythology, the constellation is associated with the myth of Callisto. Callisto was the beautiful nymph who had sworn a vow of chastity to the goddess Artemis.
One day Zeus saw the nymph and the two fell in love. Zeus and Callisto had a son named Arcas. Callisto lived as a bear for 15 years, until she came face to face with her son Arcas. Arcas quickly drew his spear but before he could attack Zeus intervened to prevent disaster.
Zeus sent a whirlwind that lifted Callisto and Arcas into the heavens. Callisto became Ursa Major. Among the Greek myths there are different versions of this tale. Another asserts that it is Artemis who transforms Callisto into a bear as punishment for breaking her vow of chastity. Many years later, Callisto along with Arcas become captured in a forest. They are imprisoned and taken to King Lycaon as a gift.
The constellation is predominantly a northern hemisphere constellation so if you don't get to see it, you know why. You will not be able to see this constellation if you are in Sydney. You would need to move a little more north. You are able to see this constellation on the horizon clear from April at about 9 p. If you want to see it earlier, you would need to stay up a little late.
The constellation is visible from a north-easterly direction. The constellation will start disappearing in June. Zeus had a son Arcas with Callisto. In a fit of rage, Hera turned Callisto into a bear.
When Arcas nearly killed his mother as he didn't know who she was, Zeus turned Arcas into a bear Ursa Minor and sent them to the stars. There are 26 Meteor Showers that occur during the year within this constellation based on information gathered from Adam Mickiewicz University Poland. The list below are major ones and which I have a date period for.
The following list contains the stars that make up the constellation. For a larger list of stars in the entire constellation area, please visit the For a list of named stars, that is stars that don't start HD or HIP, please visit Ursa Major Star List page. There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed.
Comments may be merged or altered slightly such as if an email address is given in the main body of the comment. In other versions, Arcas became the constellation of Ursa Minor. This, according to the legend, is why Ursa Major never sets below the horizon in mid-northern latitudes. The constellation of Ursa Major is the third largest constellation in the sky. Ursa Major spread out for over 1, square degrees. The constellation of Ursa Major is easy to spot due to its bright stars that form the famous Big Dipper or Little Dipper asterisms.
However, Ursa Major is best seen throughout the year from most of the northern hemisphere and appears circumpolar above the mid-northern latitudes. From southern temperate latitudes, the main asterism is invisible, but the southern parts of the constellation can still be viewed. The constellation of Ursa Major hosts seven Messier objects, they are the binary star Messier 40, the galaxies Messier 81, Messier 82, Messier , Messier , Messier , and the nebula Messier Messier 40, also known as Winnecke 4, is an optical double star consisting of two unrelated stars, first discovered by Charles Messier in Messier 40 is among the few mistakes in the Messier catalog, with astronomer Robert Burnham faulting Messier for including it when all he saw was a double star, and not a nebula or other deep sky object.
Messier 40 is composed out of two stars that are more massive than our Sun , 1. The primary star A is located at 1, light-years away, while B, at light-years. This is due to its proximity to Earth , size, and its active galactic nucleus which hosts a 70 million solar mass supermassive black hole. Messier 82, also known as the Cigar Galaxy, is a starburst galaxy situated at around 12 million light-years away from us.
It is a member of the M81 Group of galaxies. The Cigar Galaxy is the closest starburst galaxy to Earth, and it is the prototypical example of this galaxy type. It has an apparent magnitude of 8. More than young clusters have been discovered in the starburst core.
The average mass of these clusters is around , solar masses. Messier , also known as the Pinwheel Galaxy , is a face-on spiral galaxy situated at around 21 million light-years away from us.
The Pinwheel Galaxy has an apparent magnitude of 7. It is a huge galaxy, bigger than our Milky Way, having a diameter of around , light-years, having around a trillion stars. In August , a supernova explosion of a white dwarf star was observed. The grand design pattern of the Pinwheel Galaxy is suspected to be a result of the interaction between it and its companions.
Messier , also designated as NGC , is a barred spiral galaxy located at around 45, light-years away from us. Messier is seen almost edge-on from our perspective. Messier has an apparent magnitude of This galaxy has an estimated mass of around billion solar masses, having around globular clusters. Messier , also designated as NGC , is a barred spiral galaxy located at around 83 million light-years away from us.
It is exhibiting a weak inner ring structure around the central bar. This galaxy was discovered in by Pierre Mechain, friend and working colleague of Charles Messier. More satellite galaxies may exist. M is the brightest galaxy in the M Group, a large group of galaxies located in the constellation of Ursa Major that may contain over 50 galaxies.
Messier 97, also known as the Owl Nebula, or NGC , is a planetary nebula located at around 2, light-years away from us. This nebula is around 8, years old. A 16 th magnitude star resides in its center that has reached the turning point of its evolution where it condenses to become a white dwarf.
The nebula itself holds around 0.
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