Authors: Yu.G. Shevelev , V.A. Marsakov , . ... We have constructed and investigated properties of metallicity function of disk stars with different ages, proceeding from the statistically restored real altitude distributions of stars at the solar galactocentric distance. It is shown that the metallicity distribution of stars in each age range is not of Gaussian form, but it may be considered as a superposition of two normal distributions centered at -0.2 and 0.0 dex. ...

Isaak Newton (1642 - 1727). ... During 1665 - 1667 Newton made his three main discoveries: the method of fluxings and quadratures (differential and integral calculus, explanation of the light nature and the law of gravitation). ... In 1668 Newton built the first reflecting telescope. The big lens telescope gave indistinct image with painted edges. ... The scientist considered this problem indisolved and suggested a mean against chromatic aberration: a mirror must be used instead of objective lens. ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

Электронная библиотека астронома-любителя. ... Ru.Space.News: . Апрель 1998 . ... Дата: 02 апреля 1998 (1998-04-02) От: Alexander Bondugin Тема: Director Ed Stone Projects A Promising Future For JPL [1/2] Привет всем! ... Дата: 02 апреля 1998 (1998-04-02) От: Alexander Bondugin Тема: Mars Global Surveyor Imaging Schedule Announced Привет всем! ... Дата: 02 апреля 1998 (1998-04-02) От: Alexander Bondugin Тема: Announcement of the creation of Espas, the European Space Society Привет всем! ...

Lectures . ... тАЬOther Ways of Looking for Life in the SkyтАЭ ? Freeman J. Dyson . ... Lecture Series 2011-2012 . ... Dr. Freeman J. Dyson, one of the nationтАЩs most renowned physicists, and professor emeritus at the Institute for Advanced Study in Princeton, N.J., will open the AAAтАЩs 2011-2012 lecture series Friday, October 21, when he speaks on тАЬOther Ways of Looking for Life in the Sky.тАЭ The free public lecture begins at 6:15 p.m. in the Kaufmann€аTheater of the AMNH. ...

. Other Relevant Links . Number counts have been illustrated earlier in the talk. QSO Clustering and Large-Scale Structure , Scott Croom et al . QSO Evolution and the Luminosity Function , B.J. Boyle et al . | Front page | . | << - Contamination | QSO close pairs - >> | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

... Our scientific interest is an accuracy of asteroid CCD observations obtained by amateurs and professional astronomers all over in the World. ... These data help us to analyse an accuracy of real CCD positions in the MPC Database. ... Do you test your observations of the small Solar System bodies permanently before sending them to the International Minor Planets' Center? ... Do you know a real accuracy of your positional CCD-observations in comparison with the other observatories' one ? ...

... Free image alignment/stacking/processing Software . My lunar drawings . ... REAL TELESCOPES . ... Download Pocket-Aberrator . ... The Aberrator is freeware that generates star-testing images to show the effects of aberrations (distortions) influencing the quality of a telescopes performance. ... The idea to make a program like the Aberrator I got after studying many internet-sites on star-testing and often the effects of certain aberrations were only available as literal descriptions. ...

. Broadcasting . Microsoft Media Player or . Real Media Player is necessary to view OC "Mir" position in orbit . OC "MIR" position in orbit . Video and audio information archives . 1 . OC "Mir"- "ProgressM1-5" after docking press-conference . 27.01.2001 .

... 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. ...