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Cygnus OB7
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Title: A Wide-Field Near-Ir H2 2.122m line survey of the Braid Nebula Star Formation Region in Cygnus OB7 Authors: T. Khanzadyan, C. J. Davis, C. Aspin, D. Froebrich, M. D. Smith, T. Yu. Magakian, T. Movsessian, G. H. Moriarty-Schieven, E. H. Nikogossian, T.-S. Pyo, T. L. Beck Context. Outflows and...
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Andromeda Dwarfs
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Title: Andromeda Dwarfs in Light of MOND Authors: Stacy McGaugh, Mordehai Milgrom We compare the recently published velocity dispersions for seventeen Andromeda dwarf spheroidals with estimates of the MOND predictions, based on the luminosities of these dwarfs, with reasonable stellar M/L v...
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NGC 6520
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The Castaway Cluster, catalogued as NGC 6520, is located just above the spout in the Teapot of Sagittarius. This is a rich region of the Milky Way containing many gas clouds and star clusters, including the Lagoon and Trifid Nebulae. NGC 6520, a tiny jewel of a cluster, is often forgotten amongst thes...
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V1647 Orionis
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A new star appeared in the constellation of Orion in late 2003 when the young pre-main sequence star V1647 Orionis went into outburst. The eruption and huge increase in brightness of the object resulted in the appearance of a reflection nebula called McNeils Nebula, named after the amateur astrono...
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OGLE-2011-BLG-0417
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Title: OGLE-2011-BLG-0417: A Radial Velocity Testbed for Microlensing Authors: Andrew Gould, In-Gu Shin, Cheongho Han, Andrzej Udalski, Jennifer C. Yee Microlensing experiments are returning increasingly detailed information about the planetary and binary systems that are being detecte...
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Hertzsprung-Russell diagram
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The Hertzsrung-Russell Diagram (HR Diagram) as related to Stellar Radius and Temperature Hertzsrung-Russell Diagram The HR Diagrams plots stellar brightness versus surface temperature Luminosity vs. Surface Temperature Absolute Magnitude vs. Colour Index Absolute Magnitude vs. Spectra...
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IC 2177
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IC 2177 is a region of nebulosity that lies along the border between the constellations Monoceros and Canis Major. It is a roughly circular HII region centred on the Be star HD 53367. This nebula was discovered by Welsh amateur astronomer Isaac Roberts and was described by him as, "pretty brigh...
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CoRot-Exo-7b
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Tiniest exoplanet found A European satellite has spied the smallest and fastest-orbiting extrasolar planet to date, bringing astronomers closer to finding a habitable planet outside our Solar System. The Convection, Rotation and Planetary Transits (CoRoT) mission, a European Space Agency s...
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Milky Way circumnuclear ring
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SOFIA Spots Recent Starbursts in the Milky Way Galaxy's Center Researchers using the Stratospheric Observatory for Infrared Astronomy (SOFIA) have captured new images of a ring of gas and dust seven light-years in diameter surrounding the supermassive black hole at the center of the Milky Way, a...
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IRAS 07090-1946
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Title: The detection of C60 in the well-characterised planetary nebula M1-11 Authors: Masaaki Otsuka, F. Kemper, S. Hyung, B. A. Sargent, M. Meixner, A. Tajitsu, K. Yanagisawa We performed multiwavelength observations of the young planetary nebula (PN) M1-11 and obtained its elemental abunda...
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BL Lac S5 0716+714
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Title: A Quasi-Periodic Oscillation of ~ 30 Minutes in the X-ray Light Curve of the BL Lac S5 0716+714 Authors: Alok C. Gupta (1), Paul J. Wiita (2,3), Jeewan C. Pandey (1), A. K. Srivastava (1) ((1) ARIES, Nainital, India; (2) Princeton, NJ, USA; (3) GSU, Atlanta, USA) (Version v2) We withdraw our cla...
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Sirius
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The white dwarf orbiting Sirius started as a blue star with five times the Sun's mass. If this blue star still shone today, Sirius would be so bright it would cast shadows on Earth.
Just 8.6 light-years away, Sirius is already the brightest nighttime star. It is double: a bright A-type main-...
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Serpens South
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A spectacular new image from NASA's Spitzer Space Telescope uncovers a small group of young stellar "siblings" in the southern portion of the Serpens cloud, located approximately 848 light-years away from Earth. Scientists suspect that this discovery will lead them to more clues abo...
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Lithopanspermia
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Lithopanspermia in Star Forming Clusters
Authors: Fred C. Adams, David N. Spergel
This paper considers the lithopanspermia hypothesis in star forming groups and clusters, where the chances of biological material spreading from one solar system to another is greatly enh...
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DEM L50
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DEM L50: Stellar Effervescence on Display This composite image shows the superbubble DEM L50 (a.k.a. N186) located in the Large Magellanic Cloud about 160,000 light years from Earth. Superbubbles are found in regions where massive stars have formed in the last few million years. The massive star...
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