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Cosmic Halloween

Little Ghost Nebula. (NGC 6369) (Credit: Hubble Heritage Team, NASA) A planetary nebula in the constellation Ophiucus over 2000 light years away. William Herschel discovered it in the18th century. It's round like a planet, but was actually formed from material ejected by a dying star. What remains of the star is the white dwarf near the center. The nebula's main ring structure is about a light-year across. Mona Evans, “Nebulae” www.bellaonline.c...

Spooky Halloween scene in Tromsø, northern Norway. (Credit: Ole C. Salomonsen) The old birch trees reach up with gnarled arms for a strange creature in the sky. Mona Evans, “Tales of the Northern Lights” www.bellaonline.c...

Aurora, Tromsø, Norway. Taken by Kjetil Skogli on October 30, 2013. Do you see the spooky face? Perfect Halloween aurora. Mona Evans, "Aurorae - Polar Light Shows" www.bellaonline.c...

Vampire star at work. Artist's concept of blue straggler and its companion. The red giant, losing its outer layers to its companion, will end up as a white dwarf. The other star - the blue straggler - appears to be much younger, than it is, for it has been "feeding" off the other one. (Credit: Aaron M. Geller) Mona Evans, "Cosmic Ghosts Ghouls and Vampires" www.bellaonline.c...

DR 6 nebula ("Galactic Ghoul"). This is a star-forming region in the constellation Cygnus, with the central region (the "nose") about 3.5 light years across. The nebula's nickname comes from its resemblance to a ghoulish face, with cavities in the cloud looking rather like two eyes and a devouring mouth. (Credit: S. Carey (Caltech), JPL-Caltech, NASA) Mona Evans, "Cosmic Ghosts Ghouls and Vampires" www.bellaonline.c...

Perseus Cluster’s X-Ray Skull. [Credit: A. Fabian (IoA Cambridge) et al., NASA] Although it looks like something in torment, it’s just an X-Ray image of the Perseus Cluster of Galaxies. It doesn’t show the galaxies, only the X-rays given out by the gas between the galaxies. Mona Evans, "Cosmic Halloween Tour" www.bellaonline.c...

Witch's Broom Nebula. It's part of the Veil Nebula (NGC 6960), the remains of a supernova that exploded more than 15,000 years ago. The bright star (52 Cygnus) near the center of the image isn't associated with the supernova. (Credit: T. A. Rector / University of Alaska Anchorage and WIYN /NOAO/AURA/NSF) Mona Evans, "Cosmic Halloween Tour" www.bellaonline.c...

Witch Head Nebula (IC 2118). It's reflection nebula which glows by reflecting light from the bright blue star Rigel in the constellation Orion. The nebular dust grains tend to absorb red light and reflect blue light. (Image credit: Steve Mazlin, Star Shadows Remote Observatory) Mona Evans, "Cosmic Halloween Tour" www.bellaonline.c...

Reflection nebula in Cepheus cataloged as vdB 152. It's often described as a "ghostly apparition" and the picture shows it looking like the common image of a ghost. (Image credit: Giovanni Benentende) Mona Evans, "Cosmic Halloween Tour" www.bellaonline.c...