* Astronomy

Mystery cosmic objects light up in X-ray then go dim in an hour In less time than it takes you to get ready for work, some X-ray emitting space objects become hundreds of times brighter than usual, then dim back down. But what those objects are, astronomers haven't yet figured out. In 2003 and 2007, scie...

Peering deep inside Centaurus A (NGC 5128), the closest active galaxy to Earth at 10 million light-years away, the Spitzer Space Telescope's penetrating infrared cameras recorded this startling vista in February 2004. About 1,000 light-years across, the twisted cosmic dust cloud ap...

ATel 9652: Spectroscopic classification of M31N 2016-10c as a classical nova eruption very close to the M31 core

Title: Distance to NGC 0247 Authors: Barry F. Madore, Wendy L. Freedman, J. Catanzarite, Mauricio Navarrete We report VRI CCD observations of nine Cepheids in the South Polar (Sculptor) Group spiral galaxy NGC 0247. Periods of these Cepheids range from 20 to 70 days. Over the past 20 years the very b...

The Bo Xian (LL3.9) meteorite fell in Anhui, China, on the 20th October, 1977. A total mass of 7.5 kg was recovered. 33° 50'N, 115° 50'E

The Patora (H6) meteorite fell in Madhya Pradesh, India, on the 20th October, 1969. A total mass of 4.38 kg was recovered. 20° 56' 13"N, 82° 3' 0"E

The Chitado (L6) meteorite fell in Cunene, Angola, on the 20th October, 1966. An unknown total mass was recovered. 17° 21'S, 13° 58'E

The Manych (LL3.4) meteorite fell in Kalmykiya-Khal'mg Tangch, Russia, on the 20th October, 1951. A total mass of 3.56 kg was recovered. 45° 49'N, 44° 38'E

An asteroidal object discovered on the 19th August, 2009, on CCD images taken by the 0.45-m f/2.8 reflector at the Observatorio Astronómico de La Sagra for the "La Sagra Sky Survey" (LSSS), has been discovered to show a cometary appearance. The comet has no official designation yet. T = 2...

Title: Large Molecular Gas Reservoirs in Ancestors of Milky Way-Mass Galaxies 9 Billion Years Ago Author: Casey Papovich (1), Ivo Labbé (2), Karl Glazebrook (3), Ryan Quadri (1), Georgios Bekiaris (3), Mark Dickinson (4), Steven Finkelstein (5), David Fisher (3), Hanae Inami (4 and 6), Rachael L...

Title: Nearest Neighbour: The Low-Mass Milky Way Satellite Tucana III Author: J. D. Simon, T. S. Li, A. Drlica-Wagner, K. Bechtol, J. L. Marshall, D. J. James, M. Y. Wang, L. Strigari, E. Balbinot, K. Kuehn, A. R. Walker, T. M. C. Abbott, S. Allam, J. Annis, A. Benoit-Levy, D. Brooks, E. Buckley-Geer,...

Mars and Alnath Expand (118kb, 1024 x 768) Date: 4:55 GMT, 19 September 2007 Exposure: 10 sec Expand (7kb, 792 x 554)

Title: The 1989 Outburst of the Recurrent Nova V745-SCORPII Authors: Sekiguchi, K., Whitelock, P. A., Feast, M. W., Barrett, P. E., Caldwell, J. A. R., Optical and infrared observations of the 1989 outburst of the recurrent nova V745 Scorpii are reported. The outburst characteristics of the nova...

Title: The periodicity of the eta Carinae events Authors: A. Damineli (1), M. F. Corcoran (3 and 4), D. J. Hillier (2), O. Stahl (5), R. S. Levenhagen (1), N. V. Leister (1), J. H. Groh (1), M. Teodoro (1), J. F. Albacete Colombo (6), F. Gonzalez (7), J. Arias (8), H. Levato (7), M. Grosso (7), N. Morrell (9...

ATel 9647: MASTER-OAFA discovery: new bright OT