In the scalar Helmholtz equation the variables are separated in 11 physically interesting coordinate systems [ 55 ], however for the vector field containing 3 scalar functions, the complete separation of variables is possible only in 6 systems: Cartesian, 3 cylindrical, conical and spherical ones ([ 55 ], Ch.13). Therefore, the formal solution suggested in 1927 by F. Moeglich [ 368 ] for the spheroidal coordinates was practically usefulness until the work of Sh. ...

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• T-matrix method (EBCM)
• Point matching method

J2000.0 coordinates -- source coordinates in J2000.0 epoch: right ascension and declination. Currently, the proper motion is assumed to be zero for all sources.

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• Laboratory

. Aristarchus was extremely clever and also figured out a way to determine the ratio of distances between the earth and the moon and the earth and the sun. While wrong, at least he reasoned that the sun was much farther from the earth than the moon. Just Try and Follow this! . Summary of Greek Science .

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• Philosophy of Science
• Santa Cruz Calor.Intro

. Astro Space Center . (Moscow Division) . Theoretical Astrophysics . QUAD : Quantum Astrophysics . Space Radio Astronomy . SED : Space Electronic . SCD : Space Constructions . ASMGSD : AstroSpace Missions Ground Support . RT-70 : Designe & Coordination RT-70 . DPD : Data Processing . INS_Lab : Information & Navigation Systems

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• Description of the RadioAstron project, english version
• Parameters of the Moon-perturbed orbit
• Moscow departments and labs

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... When we designed the exhibit, we wanted the zodiacal constellations to be indicated. However, whereas the Orrery is laid out in the ecliptic plane, constellations are defined in B1875 equatorial coordinates. Therefore for each adjacent pair of zodiacal constellations, we calculated the point at which the J2000 ecliptic intersects the boundary between the two constellations. ... numbers . plot . image . ...

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• Observing times | International Year of Astronomy in Ireland | Astronomy 2009
• Species to be Planted
• Phenology

... We use the graph description of coordinates on Teichmuller spaces of Riemann surfaces with holes due to Penner and Fock. ... The Goldman's Poisson structure can be recovered; its quantum deformation enables us to introduce noncommutative Teichmuller spaces and to construct the quantum mapping class group and quantum modular transformations. Using the geodesic spectral description, we can find a cell decomposition of Teichmuller (and moduli) spaces in the new coordinates. ...

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• Calculus on Manifolds
• ANR OTARIE project: transport optimization and applications
• IUM10 conference: V.Ginzburg

Prague, August 16, 2006 . Another problem that was making it difficult to automatically merge GCVS and survey catalogs has been recently solved: 'old' variable stars also had only very rough coordinates. The GCVS has been identified, on a star-by-star basis, with positional catalogs. ... The total number of stars we were unable to identify, at least tentatively, is only 200, most of them from two or three sources of especially unreliable positional information. ...

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• GENERAL CATALOGUE OF VARIABLE STARS
• General Catalogue of Variable Stars: Homepage.
• GCVS Research Group: Recent publications

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

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• SAI OCL Catalog Description

System of astrometric databases of Pulkovo observatory. ... The purpose of these observations is the determination of precise coordinates of Solar system bodies, which is necessary for development and improvement of motion theories, and for studying the evolution of the Solar system. ... Accuracy of photographical observations is about 0.2-0.3 arcsec for equatorial coordinates and 0.1-0.3 for relative coordinates of planetary satellites, depending on object and observational conditions. ...

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• Pulkovo Astrometrical Plate Database
• page_17

... Milky Way . ... Map of the Milky Way (based on data from NASA's Spitzer Space Telescope) showing its two major stellar arms and central bar. ... ТљIn written science fiction, one often encounters another navigational convention, where towards the Galactic Centre is described as т??Corewardт??, away from the Centre towards the rim of the Milky Way is т??Rimwardт??, objects in the direction of the Galaxyт??s rotation are т??Spinwardт??, while objects in the opposite direction are т??antispinwardт?? ...

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... StarCalc Home Page - Downloads . ... File . StarCalc (English version) . ... With minimal configuration, version 5.72 of StarCalc includes the next interfaces: "Horizon", "Horizontal coordinategrid", "Equatorial coordinate grid", "Constellation boundaries", "Constellation lines", "Constellation names", "Star proper names", "Bright Star Catalog", "Deep-sky objects", "Sun", "Moon" and "Planets and satellites" . Plugins for StarCalc . ... Interface to NGC 2000 (plugin + catalog file) . ...

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MORPHOLOGICAL CATALOGUE OF THE CRATERS OF THE MOON . ... Coordinates, diameters and morphological features of 14 923 craters of the Moon in diameters 10 km and more are available in the catalogue. ... A lunar morphological crater catalogue was compiled by the Sternberg State Astronomical Institute in collaboration with the Unified institute of Nuclear Research, Dubna. ... 4. the presence of central peaks, ridges and mountains on the floor . ... peak and many mountains . ... many peaks, 1 mountain . ...

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• Zhanna F. Rodionova
• Morphological Catalogue Of The Craters Of Mars

Communications For Your Astronomy Event . ... Pick a set of FRS radios for communications one mile or less - At less than $10 per radio plus a sack of AA or AAA batteries, this inexpensive approach is prudent for the vast majority of events. ... GMRS is good for communications across town. ... Good ol' CB Radio has its place on the highways, but there really is no point in using it for event comms since FRS, MURS and GMRS exist. ... Star Party Radio Coordination Frequency . ... www.astronomy.net . ...

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• Near Earth Object Program, AstroGuide Listing
• Here You Go! - an Astronomy Net Education Forum Message
• Finding Himalia, The Fifth Brightest Moon Of Jupiter - an Astronomy Net Article

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... History . Brief History of Rocket and Space Technology . ... Project History . ISS Russian Segment . Steps of ISS Assembly . ... ISS 45/46 . ... Rocket Space Complexes . ... Generating input data for developing a flight onboard system for immediate determination of puncture coordinates under the ISS full-scale flight conditions. ... HISTORY . ... 2015 JSC "S.P. Korolev RSC "Energia" . ...

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• S.P.Korolev RSC Energia - LAND LAUNCH SYSTEM
• S.P.Korolev RSC Energia - MIR ORBITAL COMPLEX
• INTERNATIONAL SPACE STATION

... Sun images . ... Sun flares . ... Active areas . September : 2009 . ... No sunspots and sunspot groups can be currently observed on the Sun's surface . The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates . ... Coordinates and other characteristics of active regions are issued for September 09, 2009 00:31 UT . Last updated: September 10, 2009 00:00 UT . ... 7(499)132-65-96, Fax: +7(499)132-65-97 . ...

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• Sunspots and active regions January 14, 2006
• Sunspots and active regions January 15, 2009
• Sunspots and active regions January 11, 2008

... My mother had a 'star named for me' with the International Star Registry (henceforth ISR) as a gift for this Christmas. ... On the back of the chart, a sticker described the precise location and visual magnitude of the star, taken from the Hubble Guide Star Catalog. The first thing I noticed, was the chart was Epoch 1950. ... The coordinates were also exactly those on the ISR sticker, so I now knew that even though the ISR chart was epoch 1950, the coordinates on the sticker were epoch 1983. ...

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ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

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Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade LX200 Instruction Manual . ... Introducing the Meade LX200 . ... Built-in 64,359 Object Library . Altazimuth Mode Operation . ... Using the LX200 Manually . ... The MODE Key . Library Object Keys . ... Mode Key . ... DEC Motor Connector . ... Copyright 2006 Meade Instruments Corporation, All Rights Reserved. ...

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• Meade Instruments Corporation - Pictor Manual Part 13

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. ...

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• Centers, Missions, Laboratories...

... Regional planning meeting for the Balkan and Black Sea | ... Proposals for a web site of the Regional Network - Information on regional and global activities - Proceedings of this Meeting - Space Weather Alerts for the public - Form for submitting research and observational proposals - Database of scientific data publicly available - Greece provides solar telescope data - Romania provides data on active regions studied with helioseismis holography - Armenia provides access to...

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