... ARTICLE: The Adventurous Search For The Astronomical Unit . ... Kepler himself had suggested to use the rare occasions of Venus transiting (crossing) the solar disk to measure our distance to the planet. ... Due to the orbital inclination of Venus against the ecliptic of 3.5°, a Venus transit is so rare that it happens only at intervals of 121.5 years, 8 years, 105.5 years, 8 years and so on. ... Crabtree witnessing the transit of Venus 1639 . ... Transits of Venus - The Quest for the Solar Parallax...

... В ыбор пленок для астрофотографии часто бывает затруднен из-за того, что информацию об их работе в необычных условиях ночных съемок невозможно найти даже в технических описаниях фирм-производителей. ... Поэтому в дальнейшем мы будем использовать для сравнения разных пленок не их номинальную чувствительность, а зависимость светочувствительности от выдержки (рис. ... Форма кривых на рис.2 взята из технических описаний пленок фирмы Кодак (кривая 1 - Kodak Portra 400, кривая 2 - PJ400). ...

В&K : . ... О церковном календаре . ... Деяния совещания глав и представителей автокефальных православных Церквей в связи с празднованием 500-летия автокефалии Русской Православной Церкви . ... Иванов А.В. Несколько замечаний по поводу статьи В.А. Уварова "К вопросу о датировке православной пасхалии" . ... Лаврус В. История календаря . ... Часто задаваемые вопросы о календарях Русский перевод версии 2.4 от 28 октября 2001 г. Уваров В.А. К вопросу о математической датировке православной пасхалии . ...

Next: CCD Operation Up: Charge Coupled Devices (CCDs) Previous: Charge Coupled Devices (CCDs) . ... However it is only now that a number of important X-ray astronomical applications of CCDs have reached critical development stages, so that this is an appropriate time to review the application of space-borne CCD instruments to cosmic X-ray astronomy, and highlight the particular concerns which are being addressed for X-ray instruments, as distinct from optical applications. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Winer Observatory) was incorporated in 1983 as a 501(c)(3) non-profit public charity to perform basic research in astronomy, provide educational outreach programs, and provide site and maintenance services for small telescopes through cooperative agreements with other astronomical institutions. ... The picture at the top left of this page is of our facility near Sonoita, Arizona, approximately 50 miles southeast of Tucson, Arizona. ...

... During all period of our investigations Dr. N.Sumzina from the Institute of Applied Astronomy of RAS had prepared the Numbered Minor Planet positions from MPC Database for our processing with kind permission of the Director of Minor Planet Center Prof. Braian Marsden. ... Our extensive processing of the MPC data allows us to conclude that CCD observations of the Numbered and Unnumbered Minor Planets have the errors, sometimes very crude. ...

... The circumnuclear GASEOUS disks are often decoupled from the circumnuclear stellar disks and are even stronger inclined to the outer disk planes; in fact, we have found a considerable `population' of inner polar rings. Inner gas polar rings are found as in spiral galaxies with the massive outer gas disks co-planar to the main symmetry planes (e.g. NGC 2841, Sil'chenko et al. 1997, and NGC 7217, Sil'chenko & Afanasiev 2000) as well in many lenticular galaxies (Fig. ...

... Товаров: 0 0 руб. ... Телескопы . Телескопы FirstScope . Телескопы Travel Scope . Телескопы PowerSeeker . Телескопы AstroMaster . Телескопы Omni XLT . ... Оптические трубы . ... Бинокли . ... Зрительные трубы . ... 35 990 руб. Подробнее ... 36 990 руб. Подробнее ... 119 990 руб. ... Подробнее ... 199 990 руб. ... Подробнее ... 3 990 руб. 3 490 руб. ... Подробнее ... 22 990 руб. 19 990 руб. Подробнее ... 12 490 руб. 10 990 руб. ... Подробнее ... 90 970 руб. 53 990 руб. ...