[23], There are two supernova remnants in Cassiopeia. The right image shows how the same region of the sky … Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. Bordering constellations to Cassiopeia are Andromeda, Camelopardalis, Cepheus, Lacerta, and Perseus. [39], The December Phi Cassiopeiids are a recently discovered early December meteor shower that radiates from Cassiopeia. Cassiopeia is the 25th largest constellation in the night sky, occupying an area of 598 square degrees. Cassiopeia includes V509 Cassiopeiae, a second example of the extremely rare yellow hypergiants, which is around 400,000 times as luminous as the Sun and 14 times as massive,[29] as well as 6 Cassiopeiae which is a hotter white hypergiant. Click to see full answer. A daily update by email. Gamma Cassiopeiae has a minimum magnitude of 3.0 and a maximum magnitude of 1.6, but is generally near magnitude 2.2, with unpredictable fades and brightenings. [36], Two members of the Local Group of galaxies are in Cassiopeia. The primary is an orange-hued giant star of magnitude 4.7 and the secondary is a close pair of stars that appears to be of magnitude 9.0. The hand is made up of the stars α Cas, β Cas, γ Cas, δ Cas, ε Cas, and η Cas. Fourteen star systems have been found to have exoplanets, one of which—HR 8832—is thought to host seven planets. In Persia, she was drawn by al-Sufi as a queen holding a staff with a crescent moon in her right hand, wearing a crown, as well as a two-humped camel. [22], Delta Cassiopeiae, also known as Ruchbah or Rukbat, meaning "knee," is a possible Algol-type eclipsing binary star with a maximum brightness of magnitude 2.7. As a result of this location in the Zone of Avoidance, both are surprisingly faint despite both being within 10 million light-years away (Maffei 2 is below the range of most amateur telescopes). In skylore and in Greek mythology, Cassiopeia was a beautiful and vain queen of Ethiopia. Rotating at about 92% of its critical speed, Caph completes a full rotation every 1.12 days. The constellation was first catalogued by the Greek astronomer Ptolemy in the 2nd century, along with other constellations in the Perseus family (except Lacerta). It is around 1.9 times as massive as the Sun, and around 21.3 times as luminous. "Constellation boundaries: How the modern constellation outlines came to be", "The 2001 US Naval Observatory Double Star CD-ROM. Cassiopeia was the wife of King Cepheus of Aethiopia[4] and mother of Princess Andromeda. This constellation is circumpolar for all sky watchers who live above 40 degrees north latitude, meaning it never rises or sets. The constellation is visible in some northerly regions of the Southern hemisphere in late spring. Alpha Cassiopeiae is occasionally outshone by the variable star Gamma Cassiopeiae, which sometimes reaches magnitude 1.6. In the (sub)tropics it can be seen at its clearest from September to early November, and at low southern, tropical, latitudes of less than 25°S it can be seen, seasonally, low in the North. Located 410 ± 20 light-years from Earth,[17] it is a hot blue-white star of spectral type B3 III with a surface temperature of 15,680 K. It is 6.5 times as massive and 4.2 times as wide as the Sun, and belongs to a class of stars known as Be stars—rapidly spinning stars that throw off a ring or shell of matter.[24]. The constellation name means Queen of Ethiopia . This depiction is from Augustin Royer's 1679 atlas.[6]. It is concentrated towards its center and detached from the star field. The constellation Cassiopeia is a circumpolar constellation, that is to say, it is located close to Polaris, the North Star and can be seen throughout most of the year in the night sky in the northern latitudes. Read on to learn more about the constellation Cassiopeia and interesting Cassiopeia facts. NGC 457 is fairly rich; it is a Shapley class e and Trumpler class I 3 r cluster. The dimensions of the bow shock are vast: around 12 light-years long and 1.8 light-years wide. [28] Theta Cassiopeiae, named Marfak, is a suspected variable star whose brightness changes by less than a tenth of a magnitude. Cassiopeia is the 25 th largest constellation in the night sky. It was named after Cassiopeia, the vain and boastful queen in Greek mythology. At some times of the night or year, this constellation has more the shape of the letter M, and you might imagine the Queen reclining on her starry throne. However, the planets are usually found near the ecliptic (the Sun's path across the sky… Science news, great photos, sky alerts. The Heart Nebula and the Soul Nebula are two neighboring emission nebulae about 7,500 light-years away. M103 is far poorer than M52, with only about 25 stars included. Cluster, the Owl Cluster, and Caldwell 13. [4] Cassiopeia A is a supernova remnant and the brightest extrasolar radio source in the sky at frequencies above 1 GHz. Some legends say that Cassiopeia was chained into the sky and sometimes hangs upside-down to remind others not to be so boastful. The famous W of Cassiopeia would be unchanged because its stars are much further away than α Centauri, but the Sun would appear as an addition at the leftmost end, closest to ε Cas, creating a zig-zag pattern.[34]. It was observed in 1572 by Tycho Brahe and now exists as a bright object in the radio spectrum. [3] Its position in the Northern Celestial Hemisphere means that the whole constellation is visible to observers north of 12°S. While parts of the constellation technically rise above the horizon to observers between the latitudes of 12°S and 43°S, stars within a few degrees of the horizon are to all intents and purposes unobservable. It’s located in a rich region of western Cassiopeia. Cassiopeia has a very distinct shape. . Cassiopeia is visible all year in the Northern hemisphere. Cassiopeia the Queen is the 25th largest constellation of the 88 modern constellations. Alpha Cassiopeiae was called Poloahilani, Beta Cassiopeiae was called Polula, and Gamma Cassiopeiae was called Mulehu. The constellation hosts some of the most luminous stars known, including the yellow hypergiants Rho Cassiopeiae and V509 Cassiopeiae and white hypergiant 6 Cassiopeiae. In skylore and in Greek mythology, Cassiopeia was a beautiful and vain queen of Ethiopia. Cassiopeia constellation is located in the northern sky. It is the remnant of a supernova that took place approximately 300 years ago (as observed now from Earth; it is 10,000 light-years away),[35] and has the distinction of being the strongest radio source observable outside the Solar System. The constellation takes its name from a queen in Greek mythology. Cassiopeia is an exciting constellation to explore, offering the spectacular Messier 52 galaxy. The primary is a white-hued star of magnitude 4.5 and an α2 Canum Venaticorum variable, the secondary is a yellow-hued star of magnitude 6.9, and the tertiary is a star of magnitude 8.4. To pacify the monster, Cassiopeia’s daughter, Princess Andromeda, was left tied to a rock by the sea. Phi Cassiopeiids are very slow, with an entry velocity of approximately 16.7 kilometers per second. The discovery image (left) of a new nova that recently appeared in the constellation Cassiopeia. It was named after Cassiopeia, the vain and boastful queen in Greek mythology. Cassiopeia is the 25th largest constellation in the night sky, occupying an area of 598 square degrees. [35], NGC 457 is another open cluster in Cassiopeia, also called the E.T. The charioteer's whip was represented by Gamma Cassiopeiae, sometimes called "Tsih", the Chinese word for "whip". [15] Within the constellation's borders, there are 157 stars brighter than or equal to apparent magnitude 6.5.[d][11]. It lies in the first quadrant of the northern hemisphere (NQ1) and can be seen at latitudes between +90° and -20°. The arm is made up of the stars α Per, γ Per, δ Per, ε Per, η Per, and ν Per. It is also what is called a circumpolar constellation, meaning that it is always out at night, so is a permanently reliable point of reference. [6], Another Arab constellation that incorporated the stars of Cassiopeia was the Camel. The sky is not divided up equally between the constellations. At nightfall, the constellation Cassiopeia the Queen is easy to recognize in the northern sky, either in the evening or before dawn. In northern winter, and when seen from southern latitudes, it is "above" Polaris (i.e. Today, she serves as Editor-in-Chief of this website. [17], Epsilon Cassiopeiae has an apparent magnitude of 3.3. [11][c] High in the northern sky, it is circumpolar (that is, it never sets in the night sky) to viewers in the British Isles, Canada and the northern United States. Cassiopeia is a familiar constellation to even the most casual skygazer, its primary bright stars (see below) describing that familiar "W" shape (Or an "M" is you are of that persuasion) in the high northern sky. Oops! NGC 457 is looser, and its brightest member is Phi Cassiopeiae, a white-hued supergiant star of magnitude 5.0. [38], Cassiopeia also contains part of the closest galaxy group to our Local Group, the IC 342/Maffei Group. [6] In Hawaii, Alpha, Beta, and Gamma Cassiopeiae were named. [21], Gamma Cassiopeiae is the prototype Gamma Cassiopeiae variable star, a type of variable star that has a variable disc of material flung off by the high rotation rate of the star. The constellation Cassiopeia, Queen of Ethiopia, can be seen in the northern hemisphere all year long. Objects of magnitude 6.5 are among the faintest visible to the unaided eye in suburban-rural transition night skies. . Cassiopeia is between 0-2 hours right ascension and between 55 and 65 degrees declination. If the Earth's Sun could be observed from α Centauri, the closest star to the Solar System, it would be visible in Cassiopeia as a yellow-white 0.5 magnitude star, far brighter than any of the other stars of the constellation. Cassiopeia can be found in the sky by locating Andromeda, her daughter, and Cepheus, her husband. The cluster was discovered in 1787 by William Herschel. It is 99.4 ± 0.4 light-years from Earth. Alpha Cassiopeiae, traditionally called Schedar (from the Arabic Al Sadr, "the breast"), is a four-star system. A rich section of the Milky Way runs through Cassiopeia, containing a number of open clusters, young luminous galactic disc stars, and nebulae. Due to the brightness of its stars, Cassiopeia can be easily located in the USS Cassiopeia (AK-75) was a United States Navy Crater-class cargo ship named after the constellation. Cassiopeia is a northern circumpolar constellation, so it can be viewed all year long. [23], Rho Cassiopeiae is a semi-regular pulsating variable yellow hypergiant, among the most luminous stars in the galaxy at approximately 500,000 L☉. The constellation of Cassiopeia, which looks like a big "W," is always opposite Ursa Major. Pridefulness, in mythology, is never wise. Cassiopeia is located in the northern sky and from latitudes above 34°N it is visible year-round. [17] Around 1.2 billion years old, it has used up its core hydrogen and begun expanding and cooling off the main sequence. Cetus was about to devour her when Perseus the Hero happened by on Pegasus, the Flying Horse. To find it, look for a constellation Cassiopeia in the northern part of the sky, what is shaped like letter W. Andromeda constellation is located directly next to it, and is also connected to the stars that make up the constellation Pegasus. In France, she was portrayed as having a marble throne and a palm leaf in her left hand, holding her robe in her right hand. To locate Perseus, look to the north, where Cassiopeia forms a bright "W" or "M" (depending on its orientation). It is visible at latitudes between 90 degrees and -20 degrees. [14], The German cartographer Johann Bayer used the Greek letters Alpha through Omega, and then A and B, to label the most prominent 26 stars in the constellation. Cassiopeia is the 25th largest in terms of size in the night sky. Nicknamed the W constellation, Cassiopeia is easily recognizable for the prominent W asterism formed by its five brightest stars. The galaxies Maffei 1 and Maffei 2 are located just to the south of the Heart and Soul Nebula. A rich section of the Milky Way runs through Cassiopeia, stretching from Perseus towards Cygnus, and it contains a number of open clusters, young luminous galactic disc stars, and nebulae. Iota Cassiopeiae is a triple star 142 light-years from Earth. Cassiopeia A (Cas A) is a supernova remnant located in the constellation Cassiopeia. degrees of the night sky which equates to 1.45% of the night sky. But sky watchers still see the Chair in the W or M shape of this constellation, and speak of it. It also hosts the red supergiant PZ Cassiopeiae, which is one of the largest known stars with an estimate of 1,190–1,940 R☉ and is also a semiregular variable. NGC 185 is a magnitude 9.2 elliptical galaxy of type E0, 2 million light-years away. Dennis di Cicco / Sean Walker MDW Sky Survey Like a spring flower, a bright, new nova has bloomed from the dark earth of Cassiopeia. [6], A figure called the "Tinted Hand" also appeared in the stars of Cassiopeia in some Arab atlases. But – because of her vanity – Cassiopeia suffered an indignity. The constellation of Cassiopeia, the Queen, was one of the 48 constellations detailed by the Greek astronomer Ptolemy in the 2nd century AD. The Chukchi of Siberia similarly saw the five main stars as five reindeer stags. The constellation, Cassiopeia, the Queen, is found in the northern sky relatively close to the north celestial pole. Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Cassiopeia (listen) is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivaled beauty. The constellation is named after Cassiopeia, the queen of Aethiopia. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. closer to the zenith) and the W appears inverted. That’s a lovely old-fashioned name for the constellation Cassiopeia. Cassiopeia is a star that is named after the Greek mythological queen Cassiopeia. Eta Cassiopeiae (Achird[25]) is a spectroscopic binary star with a period of 480 years, and a suspected RS Canum Venaticorum variable. Cassiopeia compared her daughter Andromeda's beauty to that of the sea god Nereus' daughters. Cassiopeia is a large constellation located in the northern sky. [32] The two massive stars are so close to each other they distort each other into egg-shapes.[33]. The shell of matter expelled from the star is moving at 4,000 kilometres (2,500 mi) per second; it has a temperature of 30,000 kelvins on average. It has an overall magnitude of 6.4 and is approximately 10,000 light-years from Earth, lying in the Perseus arm of the Milky Way. [12] The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930,[b] are defined by a polygon of 30 segments. An amateur astronomer detected the death of the star near the constellation of Cassiopeia. Zeta Cassiopeiae (Fulu[25]) is a suspected slowly pulsating B-type star. It is also more distant, at 8200 light-years from Earth. This is variously said to represent a woman's hand dyed red with henna, as well as the bloodied hand of Muhammad's daughter Fatima. I. It was perhaps observed as a faint star in 1680 by John Flamsteed. It contains more than 100 stars, which vary widely in brightness. The North Star is located approximately midway between the central star of Cassiopeia … Kappa, Eta, and Mu Cassiopeiae formed a constellation called the Bridge of the Kings; when seen along with Alpha and Beta Cassiopeiae, they formed the great chariot Wang-Liang. [17] With a luminosity of around 771 times that of the Sun, it has swollen and cooled after exhausting its core hydrogen over its 100 to 200 million-year lifespan, spending much of it as a blue-white B-type main-sequence star. The Chinese astronomers saw several figures in what is modern-day Cassiopeia. The people of Pukapuka saw the figure of Cassiopeia as a distinct constellation called Na Taki-tolu-a-Mataliki.[10]. Andromeda was then rescued by the hero Perseus, whom she later married. Cassiopeia is easily recognized by its five brightest stars that form a "W" shape in the northern sky. [6], Other cultures see a hand or moose antlers in the pattern. We got a request for information on Cassiopeia’s Chair. Slightly dimmer and more distant NGC 147 is a magnitude 9.3 elliptical galaxy, like NGC 185 it is an elliptical of type E0; it is 2.3 million light-years from Earth. Learn about some of the brightest northern constellations: Orion, the Big Dipper, and Cassiopeia. As such, it is visible for most part of the year from the northern hemisphere. Fortunately, it is located near Cassiopeia the Queen, one of the most visible formations in the sky. In 1572, Tycho Brahe's supernova flared brightly in Cassiopeia. Its most prominent member is an orange-hued star of magnitude 8.0 near the cluster's edge. [23], The other prominent open clusters in Cassiopeia are NGC 457 and NGC 663, both of which have about 80 stars. Though they do not appear in Andromeda, both dwarf galaxies are gravitationally bound to the far larger Andromeda Galaxy. Cepheus and Cassiopeia were placed next to each other among the stars, along with Andromeda. Covering 598.4 square degrees and hence 1.451% of the sky, Cassiopeia ranks 25th of the 88 constellations in area. Cassiopeia (listen) is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivaled beauty. A planisphere is virtually indispensable for beginning stargazers. It is a spectroscopic binary, with an orbital period of 203.59 days and a companion with a calculated mass about the same as the Sun. Order your EarthSky Planisphere. Your submission has been received! [8], In the 1600s, various Biblical figures were depicted in the stars of Cassiopeia. It’s said that she committed the sin of pride by boasting that both she and her daughter Andromeda were more beautiful than Nereids, or sea nymphs. The primary and secondary are close together but the primary and tertiary are widely separated. [37], IC 10 is an irregular galaxy that is the closest known starburst galaxy and the only one in the Local Group of galaxies. The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Cas". Her boast angered Poseidon, god of the sea, who sent a sea monster (Cetus the Whale) to ravage the kingdom. Sigma Cassiopeiae is a binary star 1500 light-years from Earth. Cassiopeia has the nickname of the W constellation as this is asterism comprised of the five brightest stars is easily recognizable. It has been reported to show eclipses of less than 0.1 magnitudes with a period of 2 years and 1 month.,[23] but this has never been confirmed. [31], AO Cassiopeiae is a binary system composed of an O8 main sequence star and an O9.2 bright giant that respectively weigh anywhere between 20.30 and 57.75 times and 14.8 and 31.73 times the mass of the Sun. Thank you! She looks like a "W" or "M" in the sky, depending on where she is. Where is Cassiopeia Located in the sky? Tycho Brahe's supernova was visible within Cassiopeia, and the star Tycho G is suspected of being the donor of the material that triggered that explosion. Psi Cassiopeiae is a triple star 193 light-years from Earth. The stars of NGC 457, arrayed in chains, are approximately 10,000 light-years from Earth. The primary dominates, an orange-hued giant of magnitude 2.2, 228 ± 2 light-years from Earth. From New Zealand, you won't be able to see the northern part of the sky (Ursa Major, Cassiopeia, Draco etc.). [5] She was forced to wheel around the North Celestial Pole on her throne, spending half of her time clinging to it so she does not fall off, and Poseidon decreed that Andromeda should be bound to a rock as prey for the monster Cetus. The first, designated 3C 10 or just Tycho's Supernova Remnant, is the aftermath of the supernova called Tycho's Star. It was also the subject of the first image returned by the Chandra X-Ray Observatory in the late 1990s. [30] Between 240,000 and 270,000 times as luminous as the Sun, it is around 9,160 light-years distant from Earth. IC 10 is an irregular galaxy that is the closest known starburst galaxy and the only one in the Local Group of galaxies. [6][7], Cassiopeia has been variously portrayed throughout her history as a constellation. Bottom line: This post tells you how to find the constellation Cassiopeia the Queen on winter evenings, and it explains the mythology of this constellation. Since it is located close to the north celestial pole, it is completely below the horizon for anyone located south of -20 degrees. [29] It has a minimum magnitude of 6.2 and a maximum magnitude of 4.1; its period is approximately 320 days. The asterism is oriented as a W when below Polaris during northern spring and summer nights. Its most prominent member is actually a closer, superimposed double star; it consists of a 7th-magnitude primary and 10th-magnitude secondary. [9] These include the Lapps, for whom the W of Cassiopeia forms an elk antler. Something went wrong while submitting the form. Cassiopeia A, abbreviated Cas A, is the remnant of a supernova explosion caused by the collapse of a massive star. In Chinese astronomy, the stars forming the constellation Cassiopeia are found among three areas: the Purple Forbidden enclosure (紫微垣, Zǐ Wēi Yuán), the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ), and the White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ). If Cassiopeia the Queen lets go, she will drop from the sky into the ocean below, where the Nereids must still be waiting. The main stars of Cassiopeia make its tail, Andromeda and Triangulum form its body, and Aries makes its head. The five brightest stars of Cassiopeia – Alpha, Beta, Gamma, Delta, and Epsilon Cassiopeiae – form the characteristic W-shaped asterism. However, its most prominent member, the double star Phi Cassiopeiae, is far closer – between 1000 and 4000 light-years away. Cassiopeia Constellation Cassiopeia constellation is located in the northern sky. Omicron Cassiopeiae is a triple star and the primary is another γ Cassiopeiae variable. Nova Cassiopeiae 2021, designated V1405 Cas, shone around magnitude 8 on March 21, 2021. It can easily be spotted in the night sky because it is shaped like a W. It is made up of five main stars. [20] It is a Delta Scuti variable with a small amplitude and period of 2.5 hours. If Cassiopeia resembles a "W," Perseus will be the group of … Your email address will only be used for EarthSky content. In the equatorial coordinate system, the right ascension coordinates of these borders lie between 00h 27m 03s and 23h 41m 06s, while the declination coordinates are between 77.69° and 46.68°. At least three of Dôn's children also have astronomical associations: Caer Gwydion ("The fortress of Gwydion") is the traditional Welsh name for the Milky Way, and Caer Arianrhod ("The Fortress of Arianrhod") being the constellation of Corona Borealis. B Cassiopeiae was in fact the supernova known as Tycho's Supernova. At other times of year or night – as in the wee hours between midnight and dawn in February and March – Cassiopeia’s Chair dips below the celestial pole. Cassiopeia is one of the most recognisable of the constellations, a distinctive 'W' shape in the far northern sky. It lies Kappa Cassiopeiae is a blue supergiant of spectral type BC0.7Ia that is some 302,000 times as luminous as the Sun and has 33 times its diameter. [6], In Welsh Mythology Llys Dôn (literally "The Court of Dôn") is the traditional Welsh name for the constellation. The system is 19 light-years from Earth. At magnitude 2.2, Alpha Cassiopeiae, or Schedar, is generally the brightest star in Cassiopeia, though it is occasionally outshone by the variable Gamma Cassiopeiae, which has reached magnitude 1.6. Rho Cassiopeiae is about 10,000 light-years from Earth. The shower's parent body is a Jupiter family comet, though its specific identity is unknown.[40]. Enjoying EarthSky so far? It has a green-hued primary of magnitude 5.0 and a blue-hued secondary of magnitude 7.3. [19], Beta Cassiopeiae, or Caph (meaning "hand"), is a white-hued star of magnitude 2.3, 54.7 ± 0.3 light-years from Earth. Upsilon was later found to be two stars and labelled Upsilon1 and Upsilon2 by John Flamsteed. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says. NGC 663 is both closer, at 8200 light-years from Earth, and larger, at 0.25 degrees in diameter. Located in the norther sky opposite of the Big Dipper (Ursa Major), it is bordered by Camelopardalis, Cepheus, Lacerta, Andromeda and Perseus. and the gods were pleased, so all of these characters were elevated to the heavens as stars. It has around 450 times the Sun's diameter and 17 times its mass, having begun life 45 times as massive as the Sun. Cassiopeia A, strongest source of radio emission in the sky beyond the solar system, located in the direction of the constellation Cassiopeia about 11,000 light-years from Earth. Two Messier objects, M52 (NGC 7654) and M103 (NGC 581), are located in Cassiopeia; both are open clusters. And then this constellation appears to us on Earth more like the letter W. It’s then that the Lady of the Chair, as she is sometimes called, is said to hang on for dear life. [27] Its magnetic field and wind of particles creates a visible bow shock 4 light-years ahead of it, colliding with the diffuse, and usually invisible, interstellar gas and dust. [14] All five are prominent naked eye stars, three are noticeably variable, and a fourth is a suspected low amplitude variable. [18] Magnitude 8.9 yellow dwarf companion (B) is widely separated; companions (C and D) are closer and magnitudes 13 and 14 respectively. Cassiopeia is one of the brightest and most recognizable constellations in the night sky. Cassiopeia (pronounced ˌkæsioʊˈpiːə) is the Latin name of a large constellation (in fact it extends itself for about 40 degrees across the sky) situated close to the northern celestial pole. Its head was composed of Lambda, Kappa, Iota, and Phi Andromedae; its hump was Beta Cassiopeiae; its body was the rest of Cassiopeia, and the legs were composed of stars in Perseus and Andromeda. In the 1930s, the International Astronomical Union (IAU) dropped the word Chair from this constellation’s name, calling her simply Cassiopeia the Queen. M52, once described as a "kidney-shaped" cluster, contains approximately 100 stars and is 5200 light-years from Earth. It is highest in the sky at midnight in the months around September. Cassiopeia is located in the northern sky and from latitudes above 34 o N it is visible all year-round. It is easily recognizable due to its distinctive 'W' shape, formed by five bright stars. She was placed in the sky as a punishment after enraging Poseidon with the boast that her daughter Andromeda was more beautiful than the Nereids or, alternatively, that she herself was more beautiful than the sea nymphs. The primary is a yellow-hued star of magnitude 3.5 and the secondary is a red-hued star of magnitude 7.5. Perseus rescued the princess, and all lived happily . This is giving the star an oblate spheroid shape with an equatorial bulge that is 24% larger than the polar radius. These included Bathsheba, Solomon's mother; Deborah, an Old Testament prophet; and Mary Magdalene, a disciple of Jesus. Constellation in the northern celestial hemisphere, The 41 additional constellations added in the 16th, 17th and 18th centuries, Delporte had proposed standardising the constellation boundaries to the International Astronomical Union, who had agreed and gave him the lead role. Cassiopeia takes up 598.407 sq. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. [6], The people of the Marshall Islands saw Cassiopeia as part of a great porpoise constellation. It is easily recognizable due to its distinctive 'W' shape, formed by five bright stars. The remnant can be seen in visible light with amateur telescopes, starting with …
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