... December 29, 1999 . The Decade that Defined Star System . ... The first extra-solar star system was discovered orbiting a pulsar in 1991. Slight changes in the precise arrival times of the pulses from the central small dense neutron star gave evidence of orbiting planets . ... As the decade comes to a close, over two dozen planetary star systems have been identified, one recently confirmed by the detection of a slight eclipse by the planet itself. ... About APOD > . ...

... September 9, 1999 . Comet Hale-Bopp Over the Superstition Mountains . ... Explanation: Four years ago, Comet Hale-Bopp was discovered out near Jupiter falling toward the inner Solar System . ... Above, Comet Hale-Bopp was photographed in 1997 behind the Superstition Mountains in Arizona . Clearly visible are the comets white dust tail that shines by reflected sunlight, and the blue ion tail that shines by glowing gas. ... About APOD > . ...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

... Регистрация пользователей . ... ЗАРЯ-2004 . ... Итоги конкурса "Звезды АстроРунета и Я - 2004" (ЗАРЯ-2004). ... Правила конкурса ЗАРЯ-2004 . Ход конкурса ЗАРЯ-2004, его основные результаты и итоги . Первый пресс-релиз конкурса ЗАРЯ-2004 . Второй пресс-релиз конкурса ЗАРЯ-2004 . ... Это - и обычные любители астрономии, и астрономы-профессионалы , и работники ракетно-космической отрасли России; студенты и профессора, кандидаты и доктора наук, журналисты и даже - авторы учебников!. ...

... An Electronic Version of Volume I of the General Catalogue of Variable Stars with Improved Coordinates N. N. Samus'1,2 , * , V. P. Goranskii2 , O. V. Durlevich2 , A. V. Zharova2 , E. V. Kazarovets1 , E. N. Pastukhova1, M. L. Hazen3 , and T. M. Tsvetkova Institute of Astronomy, Russian Academy of Sciences, ul. ... Subsequently, we are planning to publish new versions of the GCVS Volumes II and III, as well as of the catalog of suspected variable stars (the NSV catalog). ... Stars, No. ... Stars Obs. ...

... The distance scales of the objects are matched both by comparing the first derivatives of the angular velocity determined separately from radial velocities and proper motions and by the statistical-parallax method. ... Good agreement between the inferred 0 and our calculations based on space velocities suggests that the Lindblad relation holds throughout the entire sample volume. ... Brandt and Blitz (1993) published the distances and radial velocities for a total of 206 H II-regions. ... Astron. ...