... 2003 March 10 . M101: The Pinwheel Galaxy . Credit Copyright : Jean-Charles Cuillandre (CFHT), Hawaiian Starlight , CFHT . ... A striking example is M101, shown above , whose relatively close distance of about 22 million light years allow it to be studied in some detail. ... One result is that M101 , also called the Pinwheel Galaxy , has several extremely bright star-forming regions (called HII regions ) spread across its spiral arms. ... About APOD | ... NASA Technical Rep.: ... NASA SEU Edu. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. August 18, 1999 . Sun Block . ... Explanation: During a total solar eclipse, Earth's moon blocks the sun - almost exactly. While the sun is about 400 times wider than the moon, it is also about 400 times farther away and each appears to be half a degree or so in diameter. ... Tomorrow's picture: Light From The Dark Sun . ... 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. ...