... On the equator (point C) the sun would always rise until it was overhead, while at the poles (A and B) it would always be on the horizon, going around the horizon once a day. ... Because everything is symmetric with respect to the line AB, the dark and light portions are always equal, and so are day and night, anywhere on Earth. ... Twice a year, the angle is as big as it can get, at the summer and winter solstices , when it reaches 23.5 degrees. ... That part of Earth enjoys summer . ...

This section of AMPLE enables one to make ephemeris calculations in various coordinate systems (spherical, rectangular) connected with different main planes (equator, ecliptic, horizon) and having origin in different points: geocenter, any point on the Earth surface, the Sun, any major planet, any minor planet. The choice of some minor planet as a center gives possibility to find approaches of the minor planet with any set of major planets and minor planets. ... equinox . 1950 2000 true . ...

... La Section #1 Des observateurs aux explorateurs de l' espace d crivait comment on observait le d placement du soleil dans le ciel, au cours des diff rentes saisons. ... Si l'axe de la terre tait perpendiculaire l' cliptique, comme ci dessous, la position du soleil dans le ciel serait mi-chemin des p les c lestes, et son trajet quotidien resterait exactement le m me, jour apr s jour, pour n'importe quel point de la terre. ... Dans cette moiti de la terre, c'est l'hiver. ... Et la distance au soleil? ...

... Sun's ecliptical positions. Explanations. Each row contains at 0h of Time Dynamical Terrestrial: month, day , day of the week, julian day number at beginning of day (only last three digits is given, add head of column to form correct number ), longitude in system of mean equinox of date (degrees, minutes, seconds ), two latitudes (the first for mean equinox of date and the second for mean epoch of year; seconds ), radius-vector (astron. units), precession in ...

This WWW form allows the user simplified access to images produced by the NRAO/VLA Sky Survey (NVSS). This service determines which NVSS image is desired based on a celestial position and returns either the image directly or a Web page with a link to the file. ... The NVSS Postage stamp (small FITS file) server can be used to obtain images with other geometries.) ... Web browsers use external viewers to display files like FITS images which they do not understand. ...

... Classes . ... TelescopeClientDirectLx200 Class Reference . ... TelescopeClientDirectLx200 (const QString &name, const QString &parameters, Equinox eq=EquinoxJ2000) . ... isConnected (void) const . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getSideralPosGeometric (const StelCore *core) const . ... getSideralPosApparent (const StelCore *core) const ....

... Our wonderful group . ... From Stars - to galaxies . ... Our group. ... Birthday party. ... Our scientific group. ... New Year party - 1997 (New Year were made by my younger brother Vasilii, who is so modest, that doesn't appear on this images:) ) . ... My birthday - 1997. ... New Year party - 1997. ... Andrew's birthday. ... Talk at Physics of Neutron stars at ST. Petersburg. ...

From XEphem running the Soft03Cmt database of 20121002, for the date and time of the observation: RA: 08:16:04.25 Dec: 27:48:13 2012-09-30 UT 09:45 UTC Measured: RA: 08:16:04.4 Dec: 27:48:12.9 Header listing for HDU #1: SIMPLE = T / This is a FITS file BITPIX = -32 / NAXIS = 2 / NAXIS1 = 4341 / NUMBER OF ELEMENTS ALONG THIS AXIS NAXIS2 = 4355 / NUMBER OF ELEMENTS ALONG THIS AXIS EXTEND = T / This file may contain ...

. Equinox - a moment of the Sun's centre passing through the celestial equator in its visible moving along the celestial sphere. The equinox occurs on the 20-21 of March (vernal) and on the 23d of September (autumnal). This time the day and the night duration is equal. Back .

... The catalog contains SAO number; the right ascension and declination with a B1950.0 equinox and epoch; annual proper motion and its standard deviation, photographic and visual magnitudes; spectral type; references to sources; the Durchmusterung (DM) identifier if the star is listed in the Bonner DM (BD), Cordoba DM (CD), or Cape Photographic DM (CP); component identification; The Henry Draper (Extension) (HD or HDE) number; and J2000 positions and proper motions. ...

... Keywords EQUINOX , RADECSYS , REFXCTYP , REFXCRPX , REFXCRVL , REFXCDLT , REFXLMIN , REFXLMAX , REFXDMIN , REFXDMAX , REFXCUNI , REFYCTYP , REFYCRPX , REFYCRVL , REFYCDLT , REFYLMIN , REFYLMAX , REFYDMIN , REFYDMAX , REFYCUNI , (and if applicable RA_PNT , DEC_PNT , PA_PNT and AVRG_PNT ) are added to the primary header. Keywords EQUINOX , RADECSYS , REFPOINT , RAREF , DECREF , ATTSRC , and if applicable ( attsrc =FIXED), ATTRA , ATTDEC and ATTPA added to events header. ...

... E.V. Kazarovets, N.N . Samus , O.V. Durlevich, S.V. Antipin, M.S. Frolov, N.N . Kireeva, E.N. Pastukhova Institute of Astronomy of Russian Academy of Sciences and Sternberg State Astronomical Institute of ... the Moscow State University ================================================================================ The 74th Special Name-list of Variable Stars , A.V. Kazarovets, N.N . Samus , O.V. Durlevich, S.V. Antipin, M.S.,Frolov, ... 3323 Samus, N.N., IBVS, 1997, No. ...