... At the Limit of Diffraction . ... Credit Copyright: Yuri Beletsky ( Las Campanas Observatory , Carnegie Institution ) Explanation: Did you ever want to just look through the eyepiece of a large telescope in space ? If you could, you would see a sharp view that was diffraction limited . ... Still, in this working earth-based snapshot a new active adaptive optics system (MagAO) is being used to cancel out the atmospheric blurring in a visual observation of famous double star system Alpha Centauri . ...

... Every year, more and more journals are switching from mailing paper copies to subscribers to putting material on the Internet either for free or via password-protected access. The primary driving force behind this is simple economics: the cost of publishing material online is a minuscule fraction of the expense of printing articles in a paper journal and mailing it. The majority of people over 40 greeted the advent of online journals with much sadness and even some derision. ...

Bridge World Standard Bridge World Standard (BWS) is a system based on the majority preferences of approximately 125 leading experts and thousands of Bridge World readers. ... Jacoby transfers (splinter rebids; game raise is slam try; two diamonds plus two spades forcing only one round); two spades shows minors; three hearts invitational, major two-suiter; Texas transfers; Stayman (two-spade rebid invitational; two-heart rebid weak; minor rebid forcing); Smolen; three of a minor invitational; Gerber. ...

... Объективы PENTAX K . ... Объективы серии Limited . ... добавить в окно сравнения . ... Объектив SMC Pentax FA 31мм f/1.8 AL Limited Black . Широкоугольный объектив высшего класса эксклюзивной серии Limited . ... Объектив SMC Pentax FA 31мм f/1.8 AL Limited Silver . Высококлассный широкоугольный объектив эксклюзивной серии Limited . ... Объектив SMC Pentax FA 43мм f/1.9 Limited . ... Объектив SMC Pentax FA 43мм f/1.9 Limited Black . ... Объектив SMC Pentax FA 77 f/1.8 Limited Black . ...

documentclass[12pt]{article} \voffset=-4cm \ begin {document} \thispagestyle{empty} %\large \ noindent $E(\ lambda )$ -- распределение энергии в спектре\\ $T'_i(\ lambda )$ -- инструментальная кривая реакции $i$-й фотометрической полосы\\ \ noindent За границей атмосферы: \ begin { equation } \ label {G0i1} G_i ^{\circ} = k_i \ int \limits_{\ lambda_1 }^{\ lambda_2 }E(\ lambda )T'_i (\ lambda )\,d\ lambda , \ end { ...

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

Добро пожаловать, Гость . ... В теме В разделе По форуму . Общероссийская неделя "Астрономия на тротуаре" - 15-17 апреля . ... Телескопостроение, оптика (Модераторы: I.A.R. , Ivan7enych ) ? Dawes Limit . ... 0 Пользователей и 1 Гость просматривают эту тему. Гость . ... В инструкциях к импортным телескопам встречается следующий параметр углового разрешания - Dawes Limit. ... Записан . ... 4.8"/Д при яркости компонентов около 5.7 и 6.4; . ... 16.5"Д при Яркости компонентов около 6.2 и 9.5; . ...

DISCLAIMER: The larger the aperture, the more light a telescope will gather and the fainter the object you can see. Here is a range of magnitudes you might expect to see. Given excellent sky conditions and good optics, a well trained eye can sometimes add up to 0.8 magnitude to these values. Limiting Magnitude depends on much more than the instruments aperture. ... One formula is for aperture in inches the other is for aperture in millimeters. ... Aperture (inches) . ... 15.2 . ...

... К вопросу возможной модификации двигателя Шкадова и ее перспективах для решения некоторых задач SETI . ... А.Л.Зайцев . ... КОНЕЦ СОЦИУМА И ПРОБЛЕМА SETI . Л.М.Гиндилис . ... ОБОСНОВАНИЕ METI . ... Борис Николаевич Пановкин о познаваемости мира и о возможности связи с внеземными цивилизациями (к 80-летию со дня рождения) . ... Alexander Zaitsev . ... КНИГА ОБ ЭВОЛЮЦИИ И ВНЕЗЕМНЫХ ЦИВИЛИЗАЦИЯХ (Рецензия на книгу А.Д.Панова Универсальная эволюция и проблема поиска внеземного разума (SETI) . ...

Астрономия и Космос Небесные тела Планеты и их спутники . Видимым парадом планет называется планетная конфигурация, когда пять ярких планет Солнечной системы (Меркурий, Венера, Марс, Юпитер и Сатурн) в своем движении по небосводу подходят друг к другу на близкое расстояние и становятся видны в одно время в небольшом секторе (10 - 40 градусов) неба. ... Из выше описанного видно, что парад планет можно наблюдать, либо вечером, либо утром. ... Не пропустите ОСЕННИЙ ПАРАД планет 2002 года! ...

... Opportunityт??s devilish view from on high . ... Does temperature have an upper limit like the lower limit of absolute zero? What's the highest measured value? ... The universe s absolute high temperature correlates to the energy and heat that existed during the Big Bang. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

This document explains some of the directives provided by the core server which are used to configure the basic operations of the server. ... Process Creation . Network Configuration . ... User . ... A single control process is responsible for launching child processes which listen for connections and serve them when they arrive. ... The User and Group directives are used to set the privileges of the Apache child processes. ... The child process creates multiple threads to serve requests. ...

. Parent Directory . do_whats_good_for_me

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade Binocular Limited Warranty . ... Meade will repair or replace the product, or part thereof, found upon inspection by Meade to be defective, provided the defective part or product is returned to Meade, freight prepaid, with proof of purchase. ... This warranty supersedes all previous Meade binocular warranties. ...

... It turns out that the current limit pot on the amplifier was set too low for the tiedowns. ... Puts max tension on td12 . ... max velocity .08 Inch/sec= (4900 rpm)/60 / (90*10.66) .. 90*10.66 is gear ratio . ... Motor current vs time. ... Scale factor between motor rpm's and dacVelCmd is the slope of the motor rpm vs velocity cmd (in dac units). ... Scale factor between motor rpms and dac velocity feedback. ... Td 4 has a max velocity of 4000 rpms while td12,8 are going at 4900 (the motor maximum). ...

Full-Text Search . ... arXiv.org . astro-ph . ... SAI VO . Search sort results by Date Relevance . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . This page hosts a simple full-text search for arXiv.org scientific e-print archive. ... The service is operated under the policy allowing us to regularly download and index the metatada of articles submitted to arXiv.org through Open Archive interface. ... SAI MSU . ...

... Лекция 1 (63K) | Лекция 2 (86K) | ... Листок 1 (125K) | ... Одной из самых известных задач в этой области, мотивировавшей многочисленные исследования в течение уже более чем века, является 16-я проблема Гильберта, а точнее вторая ее часть. В ней требуется найти верхние оценки на число предельных циклов полиномиальных векторных полей на плоскости. 16-я проблема не решена до сих пор, даже в случае квадратичных векторных полей. ... Векторные поля и поля направлений на плоскости и на сфере. ...

... But there also exists a practical angle: in a world increasingly dependent on electricity and electronics, the "space weather" outside the atmosphere can have serious effects, in particular on human communications. Currently more than 200 communication satellites circle the Earth in synchronous orbit . ... For a view of NOAA's "space weather report," click here ; another such report, from the University of Michigan, is linked here . ... Another such event occured April 7-11, 1997 . ...

Next: Design and Status of Up: No Title Previous: Limits on the Star . Design and Status of the NICMOS Cryocooler . ... Extending the NICMOS Lifetime . ... Expected NICMOS Performance after HST Servicing Mission 3 . NICMOS Cooling System Design . ... Creare Cryocooler . Power Conversion Electronics . Electronics Support Module . Aft-Shroud Cooling System . ... 2048 x 2048 HgCdTe Arrays for Astronomy at Visible and Infrared Wavelengths . ... Hybridization of 2048 x 2048 Arrays . ...