NEBULAE & STAR CLUSTERS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Thor's Helmet Nebula (NGC 2259) Thor's Helmet Nebula. Image courtesy Richard Crisp A bright nebula that surrounds, and has been blown off by the Wolf-Rayet star GSC 5407:3417 – the brightest star visible within the nebulosity. Although similar in nature to the Bubble Nebula, interactions with a nearby large molecular cloud are thought to have contributed to the more complex shape and curved bow-shock structure of Thor's Helmet. It measures some 30 light-years across and lies in the constellation Canis Major. size 8' × 8' distance about 15,000 light-years position R.A. 07h 18m 36.0s Dec: -13° 12' 00" Related category    • NEBULAE AND STAR CLUSTERS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP