... In principle, two observers on the ground can tell, by comparing the position of the same auroral arc against the background stars. ... The display stretches across Canada; just below it, in the middle of the picture, are the lights of Chicago, next to Lake Michigan. ... The Canadian scientific satellite Isis-2 (1971) carried an auroral imaging camera and discovered the diffuse aurora, a broad ribbon around the auroral oval, too spread-out to be noticed from the ground. ... Auroral Acceleration . ...

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• Sun Picture List
• Electromagnetic Waves
• The Sun's Corona

Since the light from galaxies represents the integrated contribution of its consitutient stars, then we can learn about stellar populations in galaxies by modelling their light by summing up individual stellar spectra for different kinds of stars. ... The data cover the wavelength range 3500 - 9000 angstroms. ... Retrieve Digital Stellar Spectra Click on the appropriate spectral type. ... Note that the designation V means main sequence, IV means subgiants, III means giants, I means supergiant. ...

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• Cosmological Issues for Theorists
• Astronomy HyperText Book: Fusion Sequences in Stars

... The most important tool you have to see the universe is not the large light buckets that are proliferating, but rather your eyes. ... Light enters the eye through the cornea, passes across the aqueous humor (the liquid behind the cornea), passes through the pupil and through the lens. ... After passing the lens, the light then crosses the "vitreous Humor" a jelly-like substance that fills the inner eye, and reaches the retina, the light sensitive tissue at the back of the eye. ...

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• Amateur Telescope Makers of Boston

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

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... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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• Celestron LPR (Light Pollution Reduction)
• Рецепты Астрофотографии Джима Соломона (Справочная информация)

... The MROI makes use of optical interferometry, much like COAST . ... As a major collaborator, the Cambridge Astrophysics Group is currently developing some of the mechanisms below, specifically the delay line and the fast tip-tilt system. ... Fringe tracking is used to control the positions of the delay line trolleys to make sure the light beams from the different telescopes in the MROI arrive at the science camera beam combiners in phase so that an interference pattern can be produced. ...

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• Research | Matt Bothwell
• Astrophysics Group Aperture Synthesis with Light
• Martin Krause - Large Scale Very Light Jet Simulation

... Prof. J. Hough, dean of Physical Sciences Dept. ... Dr. T. Gledhill . ... PDF file ] . Gledhill T.M., Takami M. (2001) Scattered light models of the dust shell around HD 179821. ... Hough J.H., Aitken D.K. (2003) Polarimetry in the infrared: what can be learnd? Journal of Quantitative Spectroscopy and Radiative Transfer , v.79-80, p.733-740. ... Lucas P.W. (2003) Computation of light scattering in young stellar objects. ... 2003) Scattering of light from atmospheric ice analogues. ...

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• Bibliography

... The eleven years cycle of Sun's activity is approaching its maximum! From August 24th to 29th a team of astronomers, engineers and astro-photographers will travel to southern Greenland to observe the Northern Lights (Aurora Borealis), a phenomenon expected to be particularly spectacular during this period. ... Auroras . The wonderful celestial spectacle of the aurora occurs when very energetic particles from the Sun reach the Earth's atmosphere via the solar wind. ... About GLORIA . ...

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... Corsair Gaming Sabre Лазерная, 8200DPi Лазерная, 8200DPi.. ... Подогреватель детского питания "Philips Avent" идеально подойдет для родителей, которым важна скорость подогрева бутылочек. ... С данной моделью подогревателя бутылочек можно использовать все бутылочки и контейнеры для хранения детского питания Philips AVENT. ... Philips Azur GC4910/10 паровой утюг - Philips - Philips . ...

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• Слинг Ellevill Zara шарф, хлопок (4.7 м) - Ellevill - Ellevill Zara шарф,
• Платье Love & Light - Love & Light - Love & Light Extreme
• Подвесная люстра Odeon Light - Odeon Light - Odeon Light Alicante 1989/8

You know you're a Deep Sky Observer when.. ... You consider Jupiter 'light pollution'. ... You refuse to use the ladder with your 20" f/6 at the Winter Star Party stating, "If I use that, the objects are too far north." ... You spend most of your time looking at or for objects you can barely see. Your favorite objects are objects you can barely see. ... You view a major earthquake as an opportunity for a close-in dark-sky star party. ... You believe M13 ruined your dark adaptation. ...

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• Astronomical Glossary - J thru M
• Astronomical Glossary - S - Z
• RAS Glossary A to C

http://hubblesite.org/newscenter/archive/releases/1996/22/text/ Probing the mysterious heart of the Crab Nebula, the tattered remains of a stellar cataclysm witnessed more than 900 years ago, astronomers using NASA's Hubble Space Telescope have found that the Crab is even more dynamic than previously understood, based on a cosmic "movie" assembled from a series of Hubble observations. ... Because of this flickering, the neutron star is also called a "pulsar." ...

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• dec drive fixes

... Larry Fiscelli/UC, French Leger and Steve Bastian (both FNL) (and a seamster in Alamogordo) fabricated and installed the light baffle on Tuesday and finished it up on Wednesday--the weather was favorable, albeit windy. The completed installation, as well as the cover over the secondary optics system. ... L-R)Matt Newcomb, Adrian Pope, Bob Nichol, and Aronne Merrelli (all from Carnegie Mellon) take a break to admire the light baffle during their work on the spectrograph. ...

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• lowlitbbaf
• Mounting SDSS Mosaic Camera for First Light
• Light baffle installation

... Кафедра иностранных языков . ... A robot knows only what men want him to know. ... One would think: 'Just keep on sitting comfortably and enjoying the view!' ... We - the Robotized Society - are happy to greet the last man on the Earth!' ... Long ago Men invented robots. First robots were primitive, but they already could fulfill the orders that Men gave to them. ... Nevertheless Men were superior to robots: Men could love and hate, Men could be wise or foolish, They had imagination and fantasy. ...

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• The Topical vocabulary

... Свет: остановка по требованию? ... Более мощное "управляющее поле" (свет с правой циркулярной поляризацией) делает возможным распространение в среде на порядок более слабого "сигнального поля" (упоминавшийся выше импульс, свет с левой циркулярной поляризацией), скорость распространения "сигнального импульса" при этом существенно уменьшается. ... Когда часть импульса (I) уже покинула кювету, управляющее поле выключают и из кюветы ничего не выходит до тех пор, пока управляющее поле не включат вновь. ...

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SAS home . ... List of SAS threads . This thread contains a step-by-step recipe to extract a light curve of a point-like source for all the X-ray cameras, and to start a simple analysis tool. ... If the following files are available: a) RGS event list; b) RGS source list, just a single evselect command allows a user to create a light curve, corresponding to the extraction regions in the spatial and order images. set up your SAS environment (following the SAS start-up thread ) . ...

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• Light Curve Extraction
• Extraction of a X-ray light curve for an EPIC point-like source (GUI version)
• Future developments

Installed and tested in late November 2000, new world-leading technology has made the Australia Telescope Compact Array (ATCA) the first millimetre-wave interferometer in the Southern Hemisphere. At the heart of the new millimetre receivers are indium phosphide chips, cooled to 20 K (-253њ C), the product of a joint effort between the Australia Telescope National Facility (ATNF) and the CSIRO Division of Telecommunications and Industrial Physics (CTIP). ... bkoribal@atnf.csiro.au ) ...

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• Research - Compact high-velocity clouds around the Milky Way
• Eclipse
• ATNF Daily Astronomy Picture

... Most of the time large telescopes are collecting light for a spectrograph, which spreads the light out into a rainbow. ... Atoms in the cool outer layers of a star absorb light coming from the hotter regions within, producing dark absorption lines across the spectrum. ... And astronomers do not actually use color film to take a color picture of the spectrum, for several reasons: . ... Color film does a very poor job of representing the continuous range of colors in a spectrum. ... Tutorial: Part 1 |...

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• Errors in Tired Light Cosmology
• Space-Time Diagrams
• Light Emitters and Photo Detectors

VIEW OUT OF THE WINDOW FROM BROWNSVILLE, TEXAS, USA . ... We live in Brownsville, Texas which is on the border with Mexico. Our teacher has asked us to write what we see out the window of our . classroom: . ... We see a huge tree that all the leaves . ... around the tree. Across from our third grade classroom we see the first . grade classrooms. Children are going from class to class. ... The view out our window is quite different from yours! ... Mrs. Rios' Third Grade Class . ...

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• about project

... Home Lectures Lecture Series 2011-2012 Lecture Series 2011-2012 ? тАЬA Ray of Light in a Sea of Dark (Matter)тАЭ ? Charles Keeton . ... Charles Keeton , associate professor of physics and astronomy at Rutgers University and faculty director of the Aresty Research Center for Undergraduates , will speak to the AAA Friday, March 2, on тАЬA Ray of Light in a Sea of Dark (Matter).тАЭ The free public lecture begins at 6:15 p.m. in the Kaufmann Theater of the€а American Museum of Natural History . ...

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... Image Quality of the VLT . Total Optical Control . First light for the ESO VLT unit telescope 1 occurred during the workshop. ... The image shown (Figure 1 ) here was obtained with the VLT on May 16, 1998, in red light (R band), i.e. while the mirror was still uncoated. ... In this diagram (FIgure 2), the measured image quality of the VLT UT1 astronomical images is plotted versus the ``seeing", as measured by the Seeing Monitor, a small telescope also located on top of the Paranal Mountain. ...

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• A Coronagraphic Search for Substellar Companions to Young Stars