... Stars . ... Cepheid variable stars have been known since the 18th century. ... Regularly brightening to a peak over days, weeks or months before fading these variable stars were remarkable curiosities to astronomers in past centuries.€а The term Cepheid is taken from the star Delta Cephei in the constellation of Cepheus, which was identified as variable€а in 1784 by the teenaged prodigy John Goodricke (1764-96). ... Tweets that mention Cepheids: Inconstant Stars which break the rules | ...

... Filtre Astronomik UHC (Ultra High Contrast) (1.25") . Filtre Astronomik OxygГЕne III (OIII) (1.25") . Valeur neuf 100в'ѓ (actuellement sur Optique Unterlinden), VENDU -30% SOIT 70в'ѓ piГЕce . Polarisant variable Orion (1.25") . Valeur neuf 50в'ѓ (actuellement sur Optique Unterlinden), VENDU -30% SOIT 35в'ѓ . ... Remise en mains propres sur Perpignan ou envoi postal avec frais de port partagГї. ...

... X-Ray Structural Analysis . ... The course introduces the basic principles of diffraction analysis of crystal atomic structure and the basic concepts of state-of-the-art atomic crystallography. ... X-ray crystal diffraction. тАЬGeometricalтАЭ theory of diffraction by three-dimensional scattering center grating. ... Systematic X-ray reflection extinction related to Bravais lattice type, screw axis, glide-reflection planes. €аFourier synthesis as a method of crystal atomic structure analysis. ...

... The Kilodegree Extremely Little Telescop e (KELT) pro ject is a wide field, small-ap erture survey for such transits, based on a theoretical optimization of all-sky transit searches (Pepp er, Gould, & DePoy 2003). It is similar to the other small-telescop e transit surveys with wide fields (Alonso et al. ... Figure 1 shows a sample image of a survey field. ... Among transit surveys, KELT has the largest field of view for which image subtraction has b een successfully employed. ... fields of view. ...

ASTRONOMY IN UKRAINE - 2000 AND BEYOND . ... Kyiv, Ukraine, 5-8 June 2000 . ... The primary objective of the conference is to consider the integration of astronomical research in Ukraine into the international astronomy. ... VLBI for Astronomy and Geodynamics Convenors: Kees van't Klooster (The Netherlands), Leonid M. Litvinenko (Ukraine), Chopo Ma (USA). ... Planetary Astronomy Convenors: Teodor Kostiuk (USA), Robert Nelson (USA), Yuri Shkuratov (Ukraine). ... The "general" registration fee: 100 USD. ...

... Astrophysics Data System Abstract Service - The ADS Abstract Service provides access to over 160,000 astronomical abstracts since 1975. Astrophysics Revision Site . ... Common Astrophysics Acronyms . Gravitational Wave Detector GEO 600 - aims at the direct detection of gravitational waves by means of a laser interferometer of 600 m wavelength. ... Secrets of Creation - new theory on the creation of the Universe, the Big Bang, parameters of the Universe, fundamental laws of the Universe. ...

Journal of Atmospheric and Solar-Terrestrial Physics Manuscript Draft Manuscript Number: ATP1021 Title: comment on the paper by Dalin , Pertsev and Romejko Significance of lunar impact on noctilucent clouds ( revised version) Article Type: Research Paper Section/Category: Keywords: Noctilucent clouds moon influence mesosphere Manuscript Region of Origin: Abstract: a critical review of the paper by Dalin , ... Reference: Dalin, P.A., N.N. Pertsev, V.A. Romejko. ...

... During all period of our investigations Dr. N.Sumzina from the Institute of Applied Astronomy of RAS had prepared the Numbered Minor Planet positions from MPC Database for our processing with kind permission of the Director of Minor Planet Center Prof. Braian Marsden. ... Our extensive processing of the MPC data allows us to conclude that CCD observations of the Numbered and Unnumbered Minor Planets have the errors, sometimes very crude. ...

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... Polar 2013 - . Polar Geophysics of Yamal: Observations, instruments, data bases . ... Nadym, October 21-25, 2013, RUSSIA . ... The program of the POLAR-2013 conference in Nadym will be devoted to following topics: . ... The International Conference ?Polar Geophysics of Yamal? is jointly organized by the Government of Yamal Region, The IZMIRAN (Troitsk), The Geophysical Center of RAS (Moscow), The Institute of Applied Geophysics (Moscow), The Arctic and Antarctic Research Institute (St.Petersburg). ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...