... The club will again be the stage for pursuit of all things astronomical-- from telescopes, deep sky observing, CCD imaging, and planetary sciences, to cutting edge astronomy, astrophysics, and historical astronomy presentations. ... We first drove up to the high ridge on his property to unload our observing equipment. ... Dark Skies! ... Most amateur astronomers enjoy observing these faint fuzzy objects, while others continue to observe only bright objects, in the sky. ...

Experimental rocket R-1A . To mature mass and operating characteristics of rocket R-1, its designers proposed to use an integral fuel tank and a warhead separated from the rocket at the ascent phase completion. In this case, only the ascent phase appeared to be rated for the launch vehicle and considerably more favorable regarding mechanical and thermal loads as compared to the atmospheric portion of the descent phase of the flight trajectory. ... Official WEB-site of S.P.Korolev RSC Energia . ...

... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

... At hard energies (3.5-7.5 keV), we detect a nearly circular shell of outer radius 2.8 (13 kpc). ... We find that the observed density and temperature jumps are consistent with a Mach M 1.2 shock (for monoatomic gas with = 5/3). ... Key words: Galaxy; X-ray ; M87. clusters (kT 3 - 10keV). ... These weak shocks, if there is sufficient viscosity, can provide sufficient energy to maintain the thermal energy of the gas in the cooling core of the Perseus cluster (see detailed studies including [8, 7]). ...

... Local and Regional Coordinators, and OBSERVERS are needed for Friday night's spectacular Aldebaran Occultation and Graze Aldebaran is the brightest star, other than the Sun, that can be occulted by the Moon. ... Use your camcorder (or a borrowed camcorder) to record a strong local television station. ... Encourage other amateur astronomers, and other friends and relatives in the region of visibility to record the occultation with camcorders. ... This event is called an "occultation" by astronomers. ...

... The main field of my investigations is stellar spectrophotometry. As a result of scientific activity of our group spectrophotometric catalog was created including energy distribution data on 900 stars in the range 3200-7600AA and 250 stars in the range 6000-10800AA (Voloshina et al., Spectrophotometry of Bright Stars, ed. I.N.Glushneva, 1982, Moscow, Nauka, in Russian). ...

Computer-readable version of General Catalogue of Variable Stars, Vol.V. Extragalactic Variable Stars. ... It contains the first Catalogue of variable stars in external galaxies as well as a Catalogue of extragalactic supernovae. ... Note that NGC 1466 is a globular cluster (not a galaxy) between the LMC and the SMC; we presented it separately, because it is not clear to which galaxy to attribute its variable stars. Note on VarNo: variable star No within the galaxy. ...

... 322, 347­351 (1997) ASTRONOMY AND ASTROPHYSICS The solar eclipse observed by Clavius in A.D. 1567 F.R. Stephenson1 , J.E. Jones2 , and L.V. Morrison3 1 2 3 Department of Physics, University of Durham, DH1 3LE, UK Proudman Oceanographic Laboratory, Bidston Observatory, Birkenhead, Merseyside, L43 7RA, UK Royal Greenwich Observatory, Madingley Road, Cambridge, CB3 0EZ, UK Received 14 June 1996 / Accepted 17 September 1996 Abstract. ... The solar eclipse observed by Clavius in A.D. 1567 (a) 42. ...

... 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. ...