The official abbreviation for the constellation is "Cas.". Achird is slightly lighter than our Sun, having 90% of its mass, but wider, having a radius of 103% that of our Sun’s. It has an apparent magnitude of 3.34. It lies approximately 10,000 light years from Earth and contains 172 stars.
Cassiopeia lies in the first quadrant of the northern hemisphere, and it can easily be identified due to its W or M shape. Cassiopeia A (Cas A) is a supernova remnant located in the constellation Cassiopeia.It lies at an approximate distance of 11,000 light years from Earth and has a diameter of about 10 light years. Cassiopeia A was discovered in 1947 by radio astronomers from Cambridge, England. Eta Cassiopeiae, also known as Achird, is a binary star system located at around 19 light-years away from Earth. Since it is located close to the north celestial pole, it is completely below the horizon for anyone located south of -20 degrees. The constellation was first catalogued by the Greek astronomer Ptolemy in the 2nd century, along with other constellations in the Perseus family (except Lacerta). However, she was saved in the last minute by the Greek hero Perseus, who happened to be passing by, saw Andromeda and rescued her from the monster. The orbital period is roughly 204 days. The stellar population of Messier 52 includes 18 candidate slowly pulsating B stars, one of which is a Delta Scuti variable star, three candidate Gamma Doradus variables, and possibly three Be stars. The bottom left view shows argon gas (green) that was synthesized as it was ejected from the star. It is famous for its distinctive “W” shape. The clouds of expelled material would have cloaked the light of the supernova event. It was Poseidon who placed Cassiopeia and Cepheus in the sky. It has an apparent magnitude of 3.67. The upper left panel is a composite made up of three infrared views shown in the remaining panels. Delta Cassiopeiae is an eclipsing binary star with a period of 460 days.
palm of the Pleiades or reaching from the Pleiades, the famous cluster in Taurus constellation). Caph has surface average temperatures of around 7,079 K, much hotter than our Sun. Cassiopeia the Queen is the 25th largest constellation of the 88 modern constellations.
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