NGC 3639 (also UGC 6374, MCG 3-29-36, GWT 96.32, ARAK 289 and PGC 34819) is a magnitude +13.7 face-on spiral galaxy located 250 million light-years away in the constellation Leo. The galaxy was discovered by Irish astronomer R. J. Mitchell, assistant to William Parsons, 3rd Earl of Rosse, using a...
NGC 2484 (also UGC 4125, MCG 6-18-4, GWT 178.11, ARAK 148 and PGC 22350) is a magnitude +13.3 lenticular galaxy located 590 million light-years away in the constellation Lynx. The galaxy was discovered by French astronomer Edouard Jean-Marie Stephan using a 80.01 cm (31.5 inch) reflecting teles...
The Little Joe 1B was a Launch Escape System test of the Mercury spacecraft, conducted as part of the U.S. Mercury program. The mission also carried a female Rhesus monkey (Macaca mulatta) named Miss Sam in the Mercury spacecraft. The mission was launched January 21, 1960, from Wallops Island, Virg...
Title: A Radio Determination of the Time of the New Moon Author: Y. A. Hafez, L. Trojan, F. H. Albaqami, A. Z. Almutairi, R. D. Davies, C. Dickinson, L. Piccirillo The detection of the New Moon at sunset is of importance to communities based on the lunar calendar. This is traditionally undertaken with...
Title: The WISE Catalogue of Galactic HII Regions Author: L.D. Anderson, T.M. Bania, Dana S. Balser, V. Cunningham, T.V. Wenger, B.M. Johnstone, W.P. Armentrout Using data from the all-sky Wide-Field Infrared Survey Explorer (WISE) satellite, we made a catalog of over 8000 Galactic HII regions...
Title: Cosmo++: An Object-Oriented C++ Library for Cosmology Author: Grigor Aslanyan This paper introduces a new publicly available numerical library for cosmology, Cosmo++. The library has been designed using object-oriented programming techniques, and fully implemented in C++. Cosmo++...
Title: Fast E-sail Uranus entry probe mission Author: Pekka Janhunen, Jean-Pierre Lebreton, Sini Merikallio, Mark Paton, Giovanni Mengali, Alessandro A. Quarta The solar wind electric sail is a novel propellantless space propulsion concept. According to numerical estimates, the electric s...
Title: Habitability around F-type Stars Author: S. Sato, M. ****z, C. M. Guerra Olvera, D. Jack, K.-P. Schroeder We explore the general astrobiological significance of F-type main-sequence stars with masses between 1.2 and 1.5 Msun. Special consideration is given to stellar evolutionary aspe...
Title: V1117 Her: A Herbig Ae star at high Galactic latitude? Author: M. Kun, M. Rácz, L. Szabados We examine the long-term light curve, optical spectrum, spectral energy distribution, and Galactic location of V1117 Her in order to establish its nature. V1117 Her is most probably a young intermedi...
Title: 60Fe-60Ni chronology of core formation in Mars Author: Haolan Tang, Nicolas Dauphas The timescales of accretion, core formation, and magmatic differentiation in planetary bodies can be constrained using extinct radionuclide systems. Experiments have shown that Ni becomes more sider...
Title: Periodic Radio Continuum Emission Associated with the beta Cephei Star V2187 Cyg Author: Mauricio Tapia (1), Luis F. Rodriguez (2,4), Gagik Tovmassian (1), Vicente Rodriguez-Gomez (3), Diego Gonzalez-Buitrago (1), Sergei Zharikov (1), Gisela N. Ortiz-Leon (2) ((1) IA UNAM, Ensenada,...
Thomas Stewart Baker (born 20 January 1934) is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981. Read more
P. Jenniskens, SETI Institute; and Esko Lyytinen, Helsinki, Finland, report that six Finnish observers using wide-angle video cameras (limiting magnitude +1) observed a possible outburst of gamma Ursae Minorids, a newly discovered stream (cf. CBET 1938) that until now was only known from rada...
The role of sea navigation in sparking the ancient investigation of the stars cannot be underestimated. Our earliest stories speak of the glories of the master mariner, Odysseus, caught in the powerful vortex of Poseidon's wrath for 10 long and gruelling years. Our first maps of the surroundi...
Tatooine-Like Planet Discovered Although cold and gaseous rather than a desert world, the newfound planet Kepler-16b is still the closest astronomers have come to discovering Luke Skywalker's home world of Tatooine. Like Tatooine, Kepler-16b enjoys a double sunset as it circles a pair of stars...
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