... 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...

Электронная библиотека астронома-любителя. ... библиотека . архив RSN . ... Ru.Space.News: . Июль 1998 . ... Дата: 01 июля 1998 (1998-07-01) От: Alexander Bondugin Тема: Water History, Rock Composition Among Latest Findings A Year After Mar Subject: Water History, Rock Composition Among Latest Findings A Year After Mar Привет всем! ... Дата: 01 июля 1998 (1998-07-01) От: Alexander Bondugin Тема: February Launch Planned For Mission To Collect Samples Of Comet Dust Привет всем! ...

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

Elizabeth Howell, ' World View Makes Record-Setting Parafoil Flight from Near Edge of Space ' на сайте SPACE.com , February 21, 2015. [ссылка проверена 25.02.2016] . Elizabeth Howell, ' World View Makes 1st Commercial Balloon Flight to Near Space ' на сайте SPACE.com , March 11, 2015. [ссылка проверена 25.02.2016] . ... Mike Wall, ' Watch This Amazing World View Test Flight for Balloon-Based Space Tourism ' на сайте SPACE.com , October 28, 2015. [ссылка проверена 25.02.2016] . ...

GCVS Research Group: . Recent publications . Kazarovets E.V., Samus N.N., Durlevich O.V., Kireeva N.N., Pastukhova E.N., The 81st Name-List of Variable Stars. ... Kazarovets E.V., Samus N.N., Durlevich O.V., Kireeva N.N., Pastukhova E.N., The 80th Name-List of Variable Stars. ... Samus N.N., Kazarovets E.V., Kireeva N.N., Pastukhova E.N., Durlevich O.V. General Catalogue of Variable Stars: Current status and new Name-lists Odessa Astronomical Publications, 2010, V. 23, p. 102-105. ...

Preliminary results of astroclimate parameters measurements at the Sternberg 2.5m telescope installation site V.Kornilov, N.Shatsky, S.Potanin, O.Voziakova, B.Safonov Moscow, 2008 Acknowledgements A.Belinskiy M.Kornilov A.Tokovinin M.Kuznetsov P.Kortunov E.Gorbovskoy SAI administration some SAI students Pulkovo solar station (KHSS) staff RFBR support MAVEG Gmbh Why to study optical turbulence and some other relevant ... Mean seeing by DIMM data for this night is 1''5. ...

RTT150 . ... This search system is designed for generating the necessary information on series of pointings (observations of each source consist of sets of exposures with different filters and sometimes with different exposure times) for observed sources. Search results appear at the separate page as a table with the following data: . DATE - real (not evening!) observations date (in YYYY-MM-DD format); . ... Bin - minimal CCD binning mode (may vary during the observations); . ...

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

обзор! astro-ph/0207223 . ... Author: Sultana N. Nahar . Comments: 15 pgs., 5 color figs., ... Comments: 46 pages including 16 figures, uses eas.cls, to appear in the proceedings of the Aussois 2001 summer school "Stades Ultimes de l'Evolution Stellaire", EAS Pub. ... Comments: 26 pages, 5 figures, submitted to ApJ . ... Commets: 5 pages, 4 figures, to appear in: Pis'ma v Astronomicheskii Zhurnal, 2003, v.29, No.2, p111-115 and will be translated as: Astronomy Letters, v.29, No.2, p.91-95 . ...

... 2001 . ... Сегодня: 10 апреля 2016 г. Американский исследовательский зонд NEAR Shoemaker находится сейчас на поверхности астероида Эрос, на который он сел в феврале 2001 г. До этого в течение целого года он вращался вокруг этого астероида, периодически меняя параметры орбиты и исследуя Эрос со всех сторон. ... Тем не менее, под занавес миссии терять все равно было нечего, и зонд NEAR по команде с Земли направился к поверхности астероида, до последней секунды фотографируя то, что находилось внизу. ...