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. ...

... Big ellipse: the region of the photometric analysis Smaller ellipses: the adopted inner boundaries of the Main Body and the C component Small circles: diffuse background objects, manually selected and removed from the photometry Uncleaned CMDs [V-I, I] of I Zw 18, obtained using Aloisi et al. (left) and Izotov & Thuan (right) datasets. ... Where is the 'halo'? Blue compact dwarf galaxy SBS 1415+435 Hubble Space Telescope / Advanced Camera for Surveys NASA, ESA A. Aloisi (STScI, ESA) et al. ...

... Shevchenko Vladislav Vladimirovich . ... Position: Head of Department of Lunar and Planetary Research, Sternberg State Astronomical Institute, Moscow University, Doctor of Physics and Mathematics. ... L. Johnson Space Center - Lunar and Planetary Institute. ... Sternberg State Astronomical Institute, Moscow University, Universitetsky 13, Moscow, 119899 , Russia, . ... V.I.Chikmachev, S.G.Pugacheva and V.V.Shevchenko, Sternberg State Astronomical Institute, Moscow University, Moscow, chik@sai.msu.ru ...

... This glossary is not meant to be an exhaustive list of techno-definitions. ... Is there a term you don't see here? ... Do you know how to pronounce the CONSTELLATIONS , STARS , or the PLANETS and their MOONS ? ... First Law - the orbit of each planet is an ellipse with the sun at a focus . ... LIGHT BUCKET: A common slang term for a large apertures . ... LIGHT POLLUTION: The illumination of the night sky caused by artificial light sources on the ground (streetlights, billboards, etc.) ...

... We have compiled the Catalogue of extragalactic supernovae using the GCVS card catalogue. ... Doubtful (?), or rejected (-) SN 8 A1 --- RemFlag [*] The '*' indicates a remark in sn_rem.dat 10- 19 A10 --- Gal Parent galaxy designation 21- 22 I2 h RAh Right Ascension 1950 of Parent galaxy 23- 24 I2 min RAm Right Ascension 1950 (minutes) 25- 28 F4.1 s RAs Right Ascension 1950 (seconds) 29 A1 --- DE- Declination 1950 (sign) 30- 31 I2 deg DEd Declination 1950 of Parent ...

... This program was created for correlating chosen regions in the series of fts images. ... Chosen regions' . ... In this section the program counts the integral for each region of the grid for each image. ... As a matter of fact, the integral is total brightness of the region and it is counted by 'int_tabulated' IDL function. ... In addition, the program will show the count of the regions which correlate with the corresponding region (the brighter region means the bigger count) and its contour. ...

... Contents . ... Sidereal time . ... Mean longitude of the Moon, mean elements of the Moon's orbit and equator . ... Ephemeris for physical observations of the Sun . ... Ephemeris for physical observations of the Moon . ... Matrix elements for conversion to CIRS . ... Conversion of mean time to sidereal time (with accuracy 0.01 s ) . ... Conversion of sidereal time to mean time (with accuracy 0.01 s ) . ... Conversion of mean time to sidereal time (with accuracy 0.001 s and 0.0001 s ) . ...

... 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...

... 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 . ...

C C C C C C lass lass lass lass lass lass 1 2 3 4 5 6 Introduction, Background Solar System Stars Galaxies Cosmology Special Topics Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light T lescopes e 1. ... Kirchoff's Laws trum Emission Line Spectrum 2. A low-density, hot gas emits light whose spectrum consists of a series of bright emission lines. ... Absorption Spectrum 3. ...

... I may have lied to you and about you, and made a few pronouncements a bit too sweeping, perhaps, and possibly forgotten to tag the basses here or there, And damned your extravagance, and libeled your tastes and libeled your relatives, and slandered a few your friends O.K., Nevertheless, come back. ... Come back.. ... We will invite the undertaker, who lives beneath us, And a couple of boys from the office, And some other friends. ... And a few reporters, if anything should break. ...

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... Небольшое созвездие Волосы Вероники включает в себя сразу 8 из 109 объектов каталога Шарля Мессье . ... M98=NGC 4192 : bright, very large, very much extended 152deg, magnitude 10.1m, angular diameter 9.9' x 2.2'. Right ascension: 12h13m48.18s, Declination: +14 53' 42.7", Hubble class: Sb . Alternate names: MESS 98, NGC 4192, UGC 7231, MCG 3-31- 79, CGCG 98-108, IRAS12112+1510, VCC 92 . ... Right ascension: 12h18m49.35s, Declination: +14 25' 06.9", Hubble class: Sc . ...

F these seven, or JSC2003e05929 ABOVE: NASA Administrator Sean O'Keefe (left) and Chief of the Astronaut Corps Capt. Kent Rominger (right) joined with President George W. Bush to honor the memory of the STS-107 crew. ... Our whole nation was blessed to have such men and women serving in our space program. ... Their mission was almost complete, and we lost them so close to home," President Bush said to the assembled group of employees, retirees, crew families and other dignitaries. ...

Электронная библиотека астронома-любителя. ... библиотека . архив RSN . ... Ru.Space.News: . Май 1998 . ... Дата: 18 мая 1998 (1998-05-18) От: Alexander Bondugin Тема: SJI's Sky And Space Update - May 1, 1998 Привет всем! ... 10, 1998. ... Дата: 18 мая 1998 (1998-05-18) От: Alexander Bondugin Тема: Mars Surveyor 98 Update - May 15, 1998 Привет всем! ... Дата: 18 мая 1998 (1998-05-18) От: Alexander Bondugin Тема: The Mars Microphone: Ready To Go Привет всем! ... Are There Sounds on Mars? ...

THE AMATEUR ASTRONOMERS ASSOCIATION OF PRINCETON PRESENTS THE 23nd ANNUAL JERSEY STARQUEST Held at the Hope Conference and Renewal Center , Hope , NJ Beginning at 3 PM Friday, September 6, 2013 and running through 12 PM Sunday, September 8th 2013 Featuring Stargazing at a star ... available: Fishing, Hiking, Kayaking/canoeing (bring your own equipment) on two lakes and nearby Pequest and Paulins Kill Rivers Registration Fees Camping and RV -- $35.00 ... TOTAL NUMBER OF CHILDREN (Ages 6 ­ 12)? ...

... The TAB element can be used when you want fine control over the horizontal positioning. The TAB element is used with the <tab id= name > attribute to define named tab stops. ... ALIGN . ... Following text up to next tab or line break is centered on the designated tab stop. ... Following text up to the next tab or line break is rendered flush right to the designated tab stop. ... The text up to the next tab or line break is then aligned such that the decimal point starts at the designated tab stop. ...

... Астрософт (Модератор: tlgleonid ) > . Celestia или как там ее . ... Right drag: orbit the selected object . ... Ctrl + Left drag: adjust distance to selection . Shift + Left drag: change field of view (e.g. => telescopic view) . Wheel (middle button) click: toggle field of view between 45 degrees . ... Chase selected object (orientation is based on selection's velocity) . T : Track selected object (keep selected object centered in view) . ... Ctrl+P : Mark selected object . ...

... В разделе По форуму . ... На форуме начался конкурс - Астрофотография месяца: АПРЕЛЬ! ... Форум . ... Дополнительные форумы ? Горизонты науки о Вселенной (Модераторы: Дмитрий Вибе , AlAn ) . Обсуждаем проблемы современной астрономии, астрофизики и смежных наук. ... Тема / Автор . Ответов / Просмотров . Последний ответ . ... Автор Дмитрий Вибе . 16 Ответов . 418 Просмотров . ... Автор Сергей Попов ? ... 5 102 Просмотров . ... О разделе Горизонты науки о Вселенной. ... Автор Ах . ...

THE 75th NAME-LIST OF VARIABLE STARS. ... The 75th Name-List consists of two tables. ... the literature, taken from positional catalogues, including USNO A1.0/A2.0 and GSC, or determined by the authors); the range of variability (sometimes the column Min gives, in parentheses, the amplitude of light variation; the symbol ( means that the star , in minimum light, becomes fainter, than the magnitude indicated); and the system of magnitudes used ( P are photographic ...