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Messier 3
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Title: Is mass loss along the red giant branch of globular clusters sharply peaked? The case of M3 Authors: Vittoria Caloi, Francesca D'Antona There is a growing evidence that several globular clusters must contain multiple stellar generations, differing in helium content. This hypothesis has...
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Tycho's Supernova Remnant
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The discovery of a pattern of X-ray "stripes" in the remains of an exploded star may provide the first direct evidence that a cosmic event can accelerate particles to energies a hundred times higher than achieved by the most powerful particle accelerator on Earth. This result comes from...
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NGC 6832
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NGC 6832 is a magnitude +13.3 group of stars around SAO 32016 located in the constellation Draco. The asterism was discovered by British astronomer John Herschel on the 11th August 1831. Right Ascension 19h 48m 15.5s, Declination +59° 25 22"
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NGC 6856
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NGC 6856 is an open cluster or possibly an asterism, located 5558 ±258 light-years away in the constellation Cygnus. NGC 6856 was discovered by British astronomer John Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 24th September 1829. Right Ascensio...
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Messier 29
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Messier 29 (also M29, NGC 6913, Collinder 422 and OCL 168) is a magnitude +7.1 open star cluster located 7,200 light-years away in the constellation Cygnus. The cluster was discovered by French astronomer Charles Messier using a 8.38 cm (3.3-inch) refracting telescope at the Hôtel de Cluny (now t...
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Arcturus
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Title: The limb-darkened Arcturus; Imaging with the IOTA/IONIC interferometer Authors: S. Lacour, S. Meimon, E. Thiebaut, G. Perrin, T. Verhoelst, E. Pedretti, P. A. Schuller, L. Mugnier, J. Monnier, J.P. Berger, X. Haubois, A. Poncelet, G. Le Besnerais, K. Eriksson, R. Millan-Gabet, M. Lacas...
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XMM-Newton sky survey
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For the past four years, while ESA’s XMM-Newton X-ray observatory has been slewing between different targets ready for the next observation, it has kept its c...
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NGC 7492
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NGC 7492 (also GCl 125) is a magnitude +11.2 globular cluster located 82,500 light-years away in the constellation Aquarius. The distance makes it difficult to resolve into stars, the brightest of them are of visual mag 15.5 so a 250mm telescope is required to observe visually. The globular clus...
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Local arm
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Title: The dynamical origin of the Local arm and the Sun's trapped orbit Author: Jacques R. D. Lépine, Tatiana A. Michtchenko, Douglas A. Barros, Ronaldo S. S. Vieira The Local arm of the Milky Way, a short spiral feature near the Sun whose existence is known for decades, was recently observed in deta...
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IC 418
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Title: Discovery of Multiple Shells Around the Planetary Nebula IC 418 Authors: Gerardo Ramos-Larios, Roberto Vazquez, Martin A. Guerrero, Lorenzo Olguin, R.A. Marquez-Lugo, Hector Bravo-Alfaro We have analysed optical, near-, and mid-IR images of the bright planetary nebula (PN) IC 418. Th...
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The Crab Nebula
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If you've ever wondered where the iron in your blood comes from, it was forged in the heart of a massive star. But the gold and silver in your jewellery, plus mercury, lead and other heavy metals we find useful, were created when that star exploded in a supernova. When a supernova explodes, it ejects hug...
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WZ Sagittae
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WZ Sagittae is an unusual SU UMa star Period of about 4400 days (?). Magnitude range: 10.1 v - 19 V WZ Sagittae.kmz Position (2000): RA 20h 07m 36.53s, Dec +17° 42' 15.3" The discovery of a large disc of dust around a binary star system could force astronomers to rethink their computer models of the...
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Epsilon Eridani
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Title: The corona and upper transition region of epsilon Eridani Authors: J.-U. Ness, C. Jordan We present analyses of observations of epsilon Eridani (K2 V) made with the Low Energy Transmission Grating Spectrometer on Chandra and the Extreme Ultraviolet Explorer, supplemented by observatio...
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T2.5 Brown Dwarf SIMP J013656.5+093347
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Title: Photometric Variability of the T2.5 Brown Dwarf SIMP J013656.5+093347; Evidence for Evolving Weather Patterns Authors: Étienne Artigau, Sandie Bouchard, Sandie Bouchard, David Lafrenière We report the discovery of a photometric variability in the bright T2.5 brown dwarf SIMP J01365...
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Arp220
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A blitz of star formation is taking place in a where two galaxies have collided, the Hubble Space Telescope has revealed. Researchers say studying the collision should shed light on the early universe, when such mergers were commonplace.
The intense star birth is occurring in a galaxy called [...
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