Astronomy Picture of the Day: 11/30/13 - The Dolphin Nebula This is SH2-188 - otherwise known as the Dolphin Nebula - a planetary nebula that's located approximately 850 light-years from Earth in the constellation of Cassiopeia A. In the past, SH2-188 was thought to be the remnant of a supernova explosion that appeared in 1965 (it took the light 850 years to reach us), but the nebula was later confirmed to be an asymmetrical planetary nebula with a crescent-like shape.
A mysterious arc of light found behind a distant cluster of galaxies has turned out to be the biggest, brightest and hottest star-forming region ever seen in space. The so-called Lynx Arc is one million times brighter than the well-known Orion Nebula, a nearby prototypical 'starbirth' region visible with small telescopes. The newly identified super-cluster contains a million blue-white stars that are twice as hot as similar stars in our Milky Way galaxy.
NGC 6543 Halo of the Cat's Eye. The Cat's Eye Nebula is one of the best known planetary nebulae in the sky. Its symmetries are seen in the very central region of this false-color picture, pro-cessed to reveal the enormous but extremely faint halo of gaseous mater-ial, over 3 ly across, which surrounds the brighter, familiar planetary nebula. Made with data from the Nordic Optical Telescope, Canary Islands.
The Boogie Man Nebula (also known as Lynds’ Dark Nebula (LDN) 1622) is a dark molecular cloud of less than 10 light-years across that lies only 500 light-years away in the constellation of Orion, close on the sky to Barnard’s Loop and just north of Orion’s belt, near the plane of our Milky Way Galaxy. - Image Credit & Copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona
Laniakea - Our home supercluster. The new 3D map developed by Tully and colleagues shows that the Milky Way galaxy resides in the outskirts of the Laniakea Supercluster, which is about 520 million light-years wide. The supercluster is made up of about 100,000 galaxies with a total mass about 100 million billion times that of the sun. This supercluster also includes the Virgo cluster and Norma-Hydra-Centaurus, otherwise known as the Great Attractor. | Published on 3 Sep 2014.