... COMETS . In 2007 the 26 periodical comets will return to perihelions. ... Time . ... 0.70 . ... July 7 . ... Dec. 5 . ... the interval of time required to complete one revolution in an orbit or one cycle of a periodic phenomenon, such as a cycle of phases. Note: All time moments are given in Universal Time (UT) units. For Kyiv Local_Time=UT+2 h (and Local_Time=UT+3 h for summer time). ...

This section of library contains information about "classic" Star Catalogs. ... For a Henry Draper Catalog 272149 stars have received a total of 531,211 identifications in 7 сatalogs: . 270456 - in Astrographic Catalogue ( "Carte du Ciel", 4M), . 251943 - in Guide Stars Catalog (GSC), . ... A file with information on the components of 1788 of multiple systems in catalog HDEC (3681 component, or a combination thereof, with 4054 recording). ... A file with information about 21971 variable stars. ...

The new view on the population of Galactic open clusters A.E.Piskunov1, N.V.Kharchenko2, S.RЖser3, E.Schilbach3, R.-D.Scholz4 1 2 3 4 Institute of Astronomy, Moscow, Russia Main Astronomical ... Observatory, Kiev, Ukraine Astronomisches Rechen-Institut, Heidelberg, Germany Astrophysikalisches Institut Potsdam, Germany What are open clusters and what do they teach us Groups of Population I ... Cluster complexes: OCC-1 = Gould's Belt cluster complex? ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

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. ...

ADC CATALOG HOLDINGS SHORT TITLE LIST March 29, 2002 (adapted from ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/key) Category 1: Astrometric and Positional Data - March 29, 2002 1090 Positions of 502 Stars in Pleiades Region (Eichhorn+ 1970) 1107A Washington Cat Visual Double Stars 1984.0 (Worley, Douglass 1984) 1131A SAO Star ...

... Solar System . ... Stars . ... August . ... A classical nova binary system just before an explosion on the surface of the white dwarf. Classical novas occur in a system where a white dwarf closely orbits a normal, companion star. ... A white dwarf is the inert but still white hot core of a dead star. ... This means if you have a dark enough sky the nova is visible to the naked eye but to pick it out you will need to be very familiar with the dim stars between Delphinus and Sagitta (the Arrow). ...

... Д. л. кДлнйкЙмЦЗ еУТНУ,ТНЛИ ,,УТЫ ТЪ,ВММњИ ЫМЛ,В ТЛЪВЪ ЛП. е.З. гУПУМУТУ, унй нДдйЦ "тдДгД кДллнйьзав" ї кТЪУ ,,ЫВ, Д.л., 1999 , , - , . ... XX , кДлнйкЙмЦЗ Д.л. тдДгД кДллнйьзав Зй ЗлЦгЦззйв 91 , , , . ... 1 -0,4 3 0 0,4 (B-V)0 0,8 1,2 1,6 -2 5 0 7 V 9 2 Mv 4 11 6 M45 13 8 0 0,4 0,8 B-V 1,2 1,6 . ... кДлнйкЙмЦЗ Д.л. тдДгД кДллнйьзав Зй ЗлЦгЦззйв 93 1950 +24њ +22њ +20њ +18њ +16њ +14њ +12њ Ori Ori Ori +6њ 50 40 30 20 10 0 1950 Tau +10њ +8њ 20 10 0 6 h 5h 50 40 30 20 10 0 4h 50 40 +4њ 3h . ...

This page is devoted to information on Supernova 1998S in NGC 3877 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the Supernova links web page. On this page you will find a list of images of Supernova 1998S in NGC 3877 . ... VSnet now has a SN1998S web page with observations and light curve. Perpignan Observatoire 's 1998S web page . ...

Teaching courses . for student of the Department of Astrophysics and Stellar Astronomy . ... Geophysics and physics of the planets (Kurt, Panteleev) . ... Close Binary Stars . ... Solar Physics . ... This is introductory course for students of the third year of education which are familiar with elementary astronomy and general physics. ... The one-year course includes theory of radiation transfer, theory of internal stellar structure with account of binary systems with compact comapnions. ...

... Comet Class Reference . ... Comet (const QString &englishName, int flagLighting, double radius, double oblateness, Vec3f color, float albedo, const QString &texMapName, posFuncType _coordFunc, void *userDataPtr, OsculatingFunctType *osculatingFunc, bool closeOrbit, bool hidden, const QString &pType) . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getCloseViewFov (const StelCore *core) const . ... drawOrbit (const StelCore *core, class StelRenderer *renderer) . ...

Astronomy Discussion Forums . Forums: . ... FURTHER EXPLANATION [NWOBU'S EFFECT] . ... Post Message | ... In the absence of an optical effect [Nwobu’s effect], every observer's clock will agree with one another, that is, every observer will obtain an absolute time. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Astro-ph за первую половину 2003 г." . ... Нейтронные звезды и пульсары . ... Авторы проекта обзоров astro-ph . ... Самые интересные препринты astro-ph января 2003 года по материалам обзоров Архива на сайте Scientiic.Ru " . ... Authors: Paul C Hewett et al. astro-ph/0307223 Скопление галактик, спрятавшееся за М31:наблюдения RX J0046.4+4204 на XMM-Newton (A Cluster of Galaxies hiding behind M31: XMM-Newton observations of RX J0046.4+4204) . ...

... arXiv.org . ... The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra, DIB-based interstellar medium line-of-sight structures at the kpc scale . ... We study how diffuse interstellar bands (DIBs) measured toward distance-distributed target stars can be used to locate dense interstellar (IS) clouds in the Galaxy and probe a line-of-sight (LOS) kinematical structure, a potential useful tool when gaseous absorption lines are saturated or not available in the spectral range. ...

The direct detection of gravitational waves is one of those events long-expected by physicists that are nevertheless a significant occurrence which excites the world scientific community as if something unexpected has happened. ... Many rumors leaked ahead of the conference, and the fact that something (that is, a signal corresponding to gravitational waves) was discovered by LIGO (Laser Interferometer Gravitational-Wave Observatory) was discussed on the sidelines. ... arXiv:1602.03868 . ...

... region (region-6.2.2) [xmmsas_20030110_1802-5.4.1] . ... module region _mod subroutine region get parameters; open source list; foreach source transform celestial coordinates to sky location; calculate initial estimated extraction radius; calculate distance to nearest neighbour ; loop sort sources in ascending order of nearest neighbour separation; initialise array of flags; ; First pass considering just nearest- neighbour pairs foreach source in sorted list if( ...

... Discovery of 47-s pulsations in the X-ray source 1RXS J225352.8+624354 / arXiv:1305.3439 , May 2013 . ... Optical spectroscopy of X-ray source IGR J22534+6243 / Atel # 4248 . ... Search for counterparts of newly discovered INTEGRAL/IBIS sources / Atel # 4166 . New INTEGRAL Galactic Plane Survey in SkyView / blog . Likely X-ray counterparts of newly discovered INTEGRAL/IBIS sources / Atel # 4165 . AGN in the INTEGRAL/IBIS 9-year Galactic hard X-ray survey / Atel # 4151 . ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualitГїs . ... des interviews, des portraits . les plus belles images de l'Univers dГїcryptГїes pour vous . ... des pages consacrГїes Г la publication de vos photos Mais c'est aussi une vraie communautГї avec laquelle partager votre passion et nourrir votre curiositГї. Accueil Г? la une A quelle distance sont les Гїtoiles ? ... A quelle distance sont les Гїtoiles ? ... 23/05/2014 - Les cratГЕres de Mars sont-ils Г vendre ? ...

1,2 - Modifyted Richter-Slefogt Camera (355mm, 200 mm) The system was designed by V.Yu.Terebizh in 2001 (terebizh@crao.crimea.ua), and then has been made by Gennadiy Borisov . ... Very Wide Field Camera near Kislovodsk: MASTER WFC-Kislovodsk . Up to 1200 square degrees up to 13 m. Very Wide Field Camera near Moscow (40 x 60 square degree) (CCD 1392 x 1040 pix, Sony). ... This system can discover and measure satellites and space refuse parameters to within 0.1 ang.sec. precision. ...