... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

... Aims: Today, large ground-based instruments, like VISIR on the VLT, providing diffraction-limited (about 0.3 arcsec) images in the mid-infrared where strong PAH features appear enable us to see the flaring structure of the disks around Herbig Ae stars. Although great progress has been made in modelling the disk with radiative transfer models able to reproduce the spectral energy distribution (SED) of Herbig Ae stars, the constraints brought by images have not been yet fully exploited. ...

... Электронная музыка ] [ Зодиакальные мифы ] [ Полезные ссылки ] [ Викторина ] . ... According to myth, Taurus represents the bull-form taken on by Jupiter when he became enamored of Europa, princess of Phoenicia: . ... Согласно легенде, Телец - это бык, в которого превратился Юпитер (Зевс), очарованный красотой Европы, принцессы и дочери финикийского царя Агенора. ... Близнецы - это зодиакальное созвездие, изображающее двух братьев-близнецов, Кастора и Поллукса. ...

Statistics of sunspot activity . The sunspot indices . ... The solar regions . ... NOAA 11300's . ... The description of the solar regions . ... The fine bipolar sunspots were observed at the mid latitudes of the Northern hemisphere since 14.06 to 21.06.02. ... The insignificant bipolar sunspots were observed at the 27th parallel of the Southern hemisphere since 24.06 to 28.06.02. ... The insignificant bipolar sunspots were observed since 3.07 to 10.07.02 to the East from the region 10019. ...

... Сегодня: 10 апреля 2016 г. Участник одного из этапов чемпионата Американской федерация воздухоплавателей (Balloon Federation of America) остался жив после того, как его воздушный шар неожиданно сдулся и стал падать с высоты более трех километров, сообщает Associated Press. Когда до земли оставалось около трех метров, шар напоролся на ветку дерева, что остановило его дальнейшее падение. ... Аэронавт выжил при падении воздушного шара с высоты в три километра . ...

RADIOASTROPHYSICAL DEPARTMENT  INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . ... Radioastrophysical Department , Institute of Solar-Terrestrial Physics, Siberian Division, Russian Academy of Science. ... Head of Laboratory dr. Gubin A.V. LABORATORY of INFORMATION SUPPLY and METHODOLOGY of RESEARCH . ... Head of Observatory Kitsanov S.V. SIBERIAN SOLAR RADIO TELESCOPE . Siberian solar radio telescope data at 5.7 GHz in I SOHO EIT 171 SOHO EIT 195 SOHO EIT 304 MDI Continuum MDI Magnetogram . ...

... По всем интересующим вас вопросам и предложениям вы можете связаться со мной по адресу mail@astrobooks.ru . ... Данный адрес можно использовать для пересылки мне имеющихся у вас книг, при этом желательно разбиение больших файлов на более мелкие, 1.5-2 мегабайта каждая часть. ... Добавить сообщение в гостевую книгу ? Имя: . ... Единственное, что читал по астрономии это учебник для 10 класса, не знаю с чего начать, подскажите пожалуйста. ... Я рад что нашел такой интересный и красивый сайт!! ...

... Master . ... Zel'dovich asteroid . ... August 29, 2013: Asteroid (11438) Zeldovich discovered 40 years ago . ... Asteroid (11438) has quite an elongated orbit with a period of 3.25 yr and eccentricity 0.19 (twice that of Mars). ... Asteroid will be located in Cancer constellation at the distance of 1.63 AU from Earth and 2.62 AU from the Sun (near the aphelion of its orbit), with the magnitude being 17.0m. Telescopes of MASTER network will definitely observe asteroid (11438) Zeldovich in early 2014....

... The authors compare different standpoints on historical process of ethnoses emerging and developing on the area of Ancient Russ and Great Steep: a) the concept of M.Adgi ("panturkism"), Turks ethnos was prevailing on the area; b) the concept of G.V. Nosovskiy and A.T. Fomenko ("paslavyaism"), the Slav ethnos was prevailing on the area; the concept of L.Gumilyev ("passionarnost" theory), the ethnoses were living together without dominating one over the other. ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...