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II Pegasi
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Nasa's Swift satellite has seen a giant flare explode from a nearby star.
Our Sun also flares when twisted magnetic field lines in the solar atmosphere suddenly snap - but this was on a far bigger scale, scientists say.
The energy released by the II Pegasi star was equivalent to about 50 million...
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NGC 6818
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Hubble Finds a Little Gem This colourful bubble is a planetary nebula called NGC 6818, also known as the Little Gem Nebula. It is located in the constellation of Sagittarius (The Archer), roughly 6,000 light-years away from us. The rich glow of the cloud is just over half a light-year across - humongo...
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WZ Sge-type dwarf nova
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Title: SDSS J102146.44+234926.3: New WZ Sge-type dwarf nova Authors: Alex Golovin, Ayani Kazuya, Pavlenko Elena P., Krajci Tom, Kuznyetsova Yuliana, Henden Arne, Krushevska Victoria, Dvorak Shawn, Sokolovsky Kirill, Sergeeva Tatyana P., James Robert, Crawford Tim, Corp Laurent (version v...
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NGC 6139
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Title: NGC 6139: a normal massive globular cluster or a first-generation dominated cluster? Clues from the light elements Author: A. Bragaglia (1), E. Carretta (1), A. Sollima (1), P. Donati (1,2), V. D'Orazi (3,4,5), R.G. Gratton (3), S. Lucatello (3), C. Sneden (6) ((1) INAF OA Bologna, (2) Bolo...
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Pollux
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Title: Discovery of a weak magnetic field in the photosphere of the single giant Pollux Authors: M. Auriere, G.A. Wade, R. Konstantinova-Antova, C. Charbonnel, C. Catala, W. W. Weiss, T. Roudier, P. Petit, J.-F. Donati, E. Alecian, R. Cabanac, S. Van Eck, C.P. Folsom, J. Power Aims: We observe the n...
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HL Tau
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As young stars form and evolve they generate spectacular high-speed jets and outflows consisting of molecular and atomic gas streaming away from the star. It is not completely understood what mechanisms launch these jets. This is partly because most of the action takes place in the inner, difficu...
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NGC 6813
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NGC 6813 (also IRAS 19383+2711 and SG 3.148) is a magnitude +15.0 emission nebula that surrounds a very close magnitude +14.0 double star located in the constellation Vulpecula. The nebula was discovered by German astronomer Albert Marth using a 121.92 cm (48 inch) reflector at Tigne' Point, Malt...
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HD189733
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An international team of astronomers led by François Bouchy has announced the discovery of a new transiting extra-solar planet.
The planet HD189733b, in the constellation Vulpecula, was detected and studied by the combination of two different methods, radial velocities and photome...
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Quintuplet Cluster
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Title: The Quintuplet Cluster III. Hertzsprung-Russell diagram and cluster age Authors: A. Liermann, W.-R. Hamann, L. M. Oskinova The Quintuplet, one of three massive stellar clusters in the Galactic center, is located about 30pc in projection from Sagittarius A*. Based on near-infrared K-ba...
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NGC 2346
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NGC 2346 (also Butterfly Nebula, PK 215 +3.1 and HD 293373) is a magnitude +11.6 planetary nebula located 2,000 light years away in the constellation Monoceros. A the center of the nebula is the binary star system HD 293373; The two stars orbit each other every 16 days. The nebula has a diameter of 0.34...
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HD77581
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The 6.9 mag B0.5 Ib OB-runaway star HD77581, the supergiant primary in the X-ray binary Vela X-1, both travel through interstellar space with an anomalously high velocity, creating a large bow shock infront of the star system. Only about fifty OB-associations are known in the Milky Way. Position(...
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IRAS 04186+5143
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Title: Not a galaxy: IRAS 04186+5143, a new young stellar cluster in the outer Galaxy Author: J. L. Yun, D. Elia, A. A. Djupvik, J. M. Torrelles, S. Molinari We report the discovery of a new young stellar cluster in the outer Galaxy located at the position of an IRAS PSC source that has been previously mi...
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NGC 188
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NGC 188 is an open cluster in the constellation Cepheus. It was discovered by John Herschel in 1825. Unlike most open clusters that drift apart after a few million years because of the gravitational interaction of our galaxy, NGC 188 lies far above the plane of the galaxy and is one of the most ancient o...
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NGC1333
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A new image from the Spitzer Space Telescope reveals hundreds of young stars.
The new infrared image of the reflection nebula NGC 1333, located about 1,000 light-years from Earth in the constellation Perseus, reveals dozens of stars like the Sun but much younger.
"These newborn...
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Circinus X-1
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Title: The large-scale jet-powered radio nebula of Circinus X-1
Authors: V. Tudose (1,2), R. P. Fender (3,1), C. R. Kaiser (3), A. K. Tzioumis (4), M. van der Klis (1), R. Spencer (5) ((1) Amsterdam, (2) Bucharest, (3) Southampton, (4) ATNF, (5) Manchester)
Researchers present multi-epoch...
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