IC 10 is the closest starburst galaxy to us, at around 2.2 million light-years, and the only starburst galaxy in the Local Group of galaxies. The five brightest stars in the constellation of Cassiopeia are Alpha – Schedar, Beta – Caph, Gamma – Navi, Delta – Ruchbah or Rukbat, and Epsilon – Segin Cassiopeiae. It is approximately 11,650 light years distant and one of the most luminous stars known. NGC 281 is an H II region, a large gas cloud in which star formation has recently taken place. Cassiopeia the Queen is one of the brightest and most easily recognized constellations in the night sky. The galaxy is classified as a type 2 Seyfert galaxy. These beautiful bulbs might look like they belong on Christmas trees, but they are actually different Spitzer Space Telescope views of the blown-out remains of a stellar explosion, or supernova. It is also considerably hotter than our Sun, having average surface temperatures of around 15,680 K. Segin is also 2,500 times brighter than our Sun. As the stars rotate throughout the night, Cassiopeia can sometimes be seen hanging upside down as punishment for her vanity. It has a temperature of about 50 million degrees Fahrenheit. The constellation Cassiopeia showing common, Supernova remnant Cassiopeia A a as seen by, The Heart and Soul Nebuas as seen by NASA's, The star Kappa Cassiopeiae and surrounding nebula, NGC 281, the Pacman Nebula as seen by NASA's. Zeta Cassiopeiae is a blue-white subgiant (spectral type B2IV), approximately 600 light years distant. In total, Spitzer collected separate “spectra” at more than 1,700 positions across Cassiopeia A. Astronomers then created maps from this massive grid of data, showing the remnant in a multitude of infrared colors. After their deaths, the gods placed members of the royal family near each other in the heavens. The official abbreviation for the constellation is "Cas.". It belongs to the spectral class A5. Space Exploration | Space Games | Space Gallery | Space Links, Visit Us on Facebook | Follow Us on Twitter. The irregular galaxy IC 10 is situated in Cassiopeia – it is the closest known starburst galaxy and the only one in the Local Group of galaxies. It contains several open clusters, young luminous galactic disc stars, nebulae, galaxies, and supernova remnants. It is visible all year in the Northern Hemisphere and in the northern part of the Southern hemisphere in late spring. A supernova remnant designated as Cassiopeia A – is the brightest extrasolar radio source in the sky at frequencies above 1 GHz. Cepheus is to the north and west of Cassiopeia. The constellation used to be called Cassiopeia's Chair, but the official name was changed to Cassiopeia the Queen by the International Astronomical Union in the 1930s. These include a supernova remnant known as Cassiopeia A, a planetary nebula known as the Pacman Nebula (NGC 281), and a pair of nebulas known together as the Heart Nebula and the Soul Nebula. The bottom left view shows argon gas (green) that was synthesized as it was ejected from the star. How to choose your telescope magnification? A false color image of Cassiopeia A (Cas A) using observations from both the Hubble and Spitzer telescopes as well as the Chandra X-ray Observatory. At the wedding, one of her former suitors, named Phineus, appeared and claimed that he was the only one who had the right to marry Andromeda. Rho Cassiopeiae is a yellow hypergiant star situated at around 3,400 light-years away from us, yet still visible to the naked eye. This composite shows the Cassiopeia A supernova remnant across the spectrum: Gamma rays (magenta) from NASA’s Fermi Gamma-ray Space Telescope; X-rays (blue, green) from NASA’s Chandra X-ray Observatory; visible light (yellow) from the Hubble Space Telescope; infrared (red) from NASA’s Spitzer Space Telescope; and radio (orange) from the Very Large Array near Socorro, N.M. Credit: NASA/DOE/Fermi LAT Collaboration, CXC/SAO/JPL-Caltech/Steward/O.