Measurement of Sky Brightness at the Iranian National Observatory Davoud Afshari1 and Sadollah Nasiri1,2 1Physics Department, Zanjan University, Zanjan 45195-313, Iran; Institute for Advanced studies in Basic Science (IASBS), Zanjan 45195-1159, Iran; Measurement of light pollution 2 Introduction Among 34 candidate sites at the central part of the country, 5 sites namely Garkesh (in Kashan ), Kolahbarfi(in Kashan ), Deynava (in ... One of these is light pollution. ...

... Another option is to buy slides of astronomical objects at different wavelengths to show students why astronomers use different bands of the spectrum to bring out specific characteristics in celestial objects. ... He then uses the camera to scan the entire classroom, asking students to identify what they are seeing. ... Once students see light in action, they can investigate its properties - such as frequency, wavelength, and interference - with wave experiments. ...

... Contacting and discussing with people sharing your interests, participating in night sky observations with telescopes as well as a large choice of astronomical books, magazines and video-tapes out of our club library. ... A reasonable compromise for observing both planets and brightest deep sky objects ( nebulae, galaxies) are either a 4 to 8 inch mirror telescope ( Newton, Schmidt-Cassegrain ) or a 3 to 4 inch refracting ( lens) telescope. ... Where can I buy a telescope in Luxembourg ? ...

Astro Space Center RadioAstron Newsletter Number 16 October 9, 2012 ====================== One year has passed since the birth of the Spektr-R 10-meter orbiting radio telescope About one year ago, on September 27, 2011, the space radio telescope Spektr-R has registered the first light from the supernova remnant Cassiopeia A. Congratulations to all involved! ... First RadioAstron-EVN image of the active galaxy 0716+714! ... The image is reconstructed with a 0.5 mas circular beam. ...

2014 May version . ... Green D. A., 2014 , Bulletin of the Astronomical Society of India, 42 , 47-58. ( .pdf , or arXiv.org:1409.0637 ) If you make use of the detailed version of the catalogue, then plaese also cite: . Green D. A., 2014, `A Catalogue of Galactic Supernova Remnants (2014 May version)' , Cavendish Laboratory, Cambridge, United Kingdom (available at "http://www.mrao.cam.ac.uk/surveys/snrs/" ). ... Copyright D. A. Green 2014. 25872nd access to this version of the catalogue. ...

... A star party is a gathering of amateur astronomers who set up their telescopes and observe the dynamic night sky. ... Star parties are best scheduled during first quarter and waxing gibbous Moon. During full moon, the moon is so bright it obscures a view of other celestial objects and even the Moon is best viewed when NOT full. ... We will consult local weather forecasters and make a decision by 2:00p on the day of the star party. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

El Diablo enter newborn players and gather weigh their innocence only the brightest shine but not forever many lights die, many tears rain when those tears run dry on a mountain madness day you were just in time for a foolish deal ... a lover sold i can't stand another howling day inside of this empty skin while the beacons burn a flame please return from so far away one life with the devil do i play for so long el diablo is to ...

... UBV system; U,B,V photometry of A0620-00 #Ref: A A 48, 141 ( 1976 ) Duerbeck and Walter #mean errors of single brightness differences between comparison #and check star are : 0.006 (V); 0.006 (B) ; 0.009 (U) - #adopted 0.01 for all #Table: UBV magnitude differences, A0620-00 minus BD -0o1275 # = i.e. B(A0620-00) = B(comparison) + delta B # есть быстрые флуктуации яркости и цвета # по крайней мере, за полчаса (Лютый, 1976 ; Robertson, ...

... Производитель: Lightstar . ... Коллекция: Simple Light 810 . Артикул: 810010 . ... Новое наименование: Подвесной светильник Lightstar Simple light 810 810010 . ...

UNIXhelp is available for anybody to use on the World Wide Web . However if you are based outside Edinburgh, you may find each page slow to load across the network. We would recommend installing a copy at your local site. ... The main distribution site appears below but there may be an mirror of the distribution closer to you. ... Contact the UNIXhelp maintainer if you can help. The Copyright for the UNIXhelp deliverables rests with the Computing Services of the University of Edinburgh. ...

... Copyrightї1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

... The scheme for defining the background extraction region defined here is preliminary. ... The true PSF of the mirrors is approximately elliptical towards the edges of the field-of-view, therefore the best extraction region may be an ellipse rather than a circle, or better still a ``banana''. ... It would therefore generally be larger for brigher sources. ... For very crowded sources the best extraction region may not be circular (or ellptical), it may be a segment. ...

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

... Q. May I connect my laptop (PDA) to MCCME local network? ... If you are going to use our network several times, please write a letter to the system administrator (Sergey Dubov, <dubov (at) mccme.ru>). Please mention your name, your login name on mccme.ru (if any), the version of the operating system you are using, and the MAC address of the network card. ... Q. What settings should I use (IP address, network mask, gateway)? ... Q. May I connect my computer to the network using 802.11 protocol? ...

CREATING NEW OPTICAL DESIGN LOW DISTORTION HIGH TRANSMITTANCE SIMPLE AND COMPACT OPTICAL DESIGN COUPLED TO CCD AS INPUT WINDOW NEW OPTICAL DEVICE TO REPLACE LENS Fiber optic plate (FOP) is optical device bundling optical fibers having several micro-meters in diameter. It will transfer the light and image with high efficiency and low distortion, which allows it as the better replacement of optical lens. ... CCD . ... Handle FOP carefully FOP is made from glass material. ...

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

... Please send a check to the address above. ... For more information , please email the AAAP Secretary Jim Poinsett: secretary@princetonastronom y.org Last Name: ____________________ First Nam e:______ __________________ Gender: M F Address : ________________________________________________ City: ___________________________________________________ State: _______________ Zip: ____________ Phone: ___________________________________ Email : __________________________________________________ Note...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Phase range for plots: -0.5 to 1.0 0.0 to 2.0 0.0 to 1.0 . ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... Two period search methods are currently implemented. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . ...