... Future seminars . P a s t seminars . Seminar council . ... A.F. Zakharov (Institute of Theoretical and Experimental Physics) . ... Different regimes of gravitational lensing depend on masses of lens and correspond roughly an angular distance between images. If a gravitational lens has a typical stellar mass, this regime is named as microlensing because a typical angular distance between images is about microarcseconds in the case if sources and lenses are located at cosmological distances. ...

... 400mm f/2.8 Nikor lens: images the sky on the entrance slit. ... The optical system maintains image quality along the slit length so that each row of the image is a spectrum of that spatially selected region of the sky. 180mm f/2.8 Nikor lens: collimates the light from the slit. ... The auxiliary optical platform on WISPI now accomodates a short focal lens and a guiding/imaging video system that may use sub-pixel corrections to provide feedback to the tracking drive motors. ...

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. FOR DETAILED INFORMATION SEE . "DEVELOPMENTS AND PRODUCTS"

... Among their major tools of exploration are the images and data in large surveys taken using the Hubble Space Telescope. ... A Collection of Resources to Get Behind the Headlines . ... This episode of Astronomy Behind the Headlines is indeed ripped from recent headlines, when astronomers used the newly refurbished Hubble Space Telescope to see deeper into space (and thus farther back in time) than had ever been possible. ... The James Webb Space Telescope page on finding the first stars and galaxies:...

... gravitational lensing . ... views of mt. maidanak . maidanak lab home page . ... E. A. Koptelova, V. L. Oknyanskij and E. V. Shimanovskaya Determining time delay in the gravitationally lensed system QSO2237+0305 .A 452, 37-46 (2006) . E.A. Koptelova, E.V. Shimanovskaya, B.P. Artamonov, M.V. Sazhin, A.G. Yagola, V.V. Bruevich, O.M. Burkhonov Image reconstruction technique and optical monitoring of the QSO2237+0305 from Maidanak Observatory in 2002 -- 2003 . ... ISIP 2003. ... 2003, Nagano City. ...

. Galaxy and four QSO images; SPIcam data with FWHM = 0.77" PSF. (Blow-up shown below). Close-up of QSO images (Circle enclosing 4 images has a radius of 0.9".) Data obtained by Camron Hastings for the APO-PU Gravitational Lens Monitoring Project. Image processing by Dan Long and Ed Turner.

... Hand Made (Модераторы: Diskus , Hornet ) > . Vivitar 500mm Mirror Lens f/6.3 . ... Благодарностей: 0 . Ответ #40 : 04 Август 2010, 17:39:19 ? ... Цитата: alexmeade от 05 Август 2010, 22:15:56 1. ... Цитата: alexmeade от 06 Август 2010, 10:45:23 А ваша дигональ шла без трубки 1,25"? ... Цитата: alexmeade от 06 Август 2010, 13:58:40 А что стоит вытачить трубку и нарезать резьбу М28х1? ...

Общая Астрономическая Конференция > Все про астрономическое оборудование > Астрономическое оборудование > Что это такое? ... vitar . ... На единственной бумажке в коробке написано super panoramic macro high resolution high speed fully automatic conversion lens. ... 02.04.2011, 10:58 . ... Судя по надписи - широкоугольная насадка на объектив+ИК-фильтр в одном флаконе для какой-то камеры. ... Я большинство объективов так смотрю. ... OPTICAL SYSTEM, Conversion type mounts on front of existing lens. ...

Blog . ... What's New? Bad Astronomy . ... News . ... Site Info . ... RELATED SITES . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... My office was abuzz yesterday about new images taken by the Hubble Space Telescope (HST). ... For 10 straight days, Hubble stared at a relatively unpopulated region of deep space, allowing unimaginably faint starlight to collect on the telescope's electronic lens. ... 2008 Phil Plait. ... THE BIRDCAGE: ARCHIVE OF OTHER BAD NEWS ITEMS . ...

RECREATIONAL TELESCOPES . ... TELESCOPE ACCESSORIES . ... Astele™ 60, 70, 95, 133.5 . ... German Equatorial Mount for Astele™ 133.5, 150, 102MN . Astele™ 102MN, 133.5, 150 . ... German Equatorial Mount for Astele™ 180, 203,152MN, 203MN . ... Astele™ 95, 102MN, 133.5, 150, 152MN, 203MN . ... Photo Adapter for Astele™ 133.5,150,180, and 203 . Astele™ 133.5, 150, 180, 203 . ... Astele™ 60, 70, 95, 102MN, 133.5, 150, 152MN, 180, 203, 203MN . ... Eyepiece Adapter, 2" – 1.25", Astele™ 152MN, 203MN . ...

... Tsupko Gravitational Lensing in Plasmic Medium Plasma Physics Reports, 2015, Vol. ... 562­581 The influence of plasma on different effects of gravitational lensing is reviewed. Using the Hamiltonian approach for geometrical optics in a medium in the presence of gravity, an exact formula for the photon deflection angle by a black hole (or another body with a Schwarzschild metric) embedded in plasma with a spherically symmetric density distribution is derived. ...

... Concept Spacecraft . ... The proposed lentiular design concept for the Apollo spacecraft was one of several unorthodox designs rejected in favour of the more familiar conical shape which was lighter and less complex.The lenticular design was a ?road not taken?, losing out to less challenging configurations.It is strange to think that if history had proceeded differently, each Apollo crew could have ended their lunar mission by gliding to a touchdown on a runway at Edwards AFB in a flying saucer! ...

. 9 Mar. 1997 . 50mm/2.8 lens . Comet Hale-Bopp . 1995 О1 . from Siberia . 7 Apr. 1997. 50mm/2.8 lens . Kodak400 . Special Page . About this comet (in Russian) . Our observations (in Russian) . Visual observations for ICQ . Some our 1995 O1 images . В самое начало | Солнечная система | Кометы | Фотогалерея

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit†йs . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Mati†иre €л passe-muraille €Ё . ... La combinaison des deux images r†йv†иle comment la fusion des deux corps a s†йpar†й mati†иre classique (en rose au centre) et mati†иre noire (en bleu autour). ... 19/12/2013 - Le lancement de Gaia en direct ! ...