... Observing springtime deep-sky objects with a large telescope . ... Buy and sell astronomy gear April 9 . ... Astronomy.com: Jim Forbes . ... A refracting telescope makes use of this property with a carefully made lens having curved surfaces. ... The first telescope (of any type) was constructed by the Dutch spectacle maker Hans Lippershey (1570 1619) who, on October 2, 1608, filed a patent application for "an instrument for seeing faraway things as though nearby." ... Buying your first telescope . ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australian Square Kilometre Array Pathfinder . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . ... Photographic amplification (Malin 1978) is a photographic enhancement process based on a simple, non-destructive contact copying procedure. ... The value of a narrow-band filter, well matched pixel size and photographic amplification are well shown in Fig. ...

... Basic algorithms for the production of stellar photometry from CCD observations are described and reviewed. ... The problem of doing accurate stellar photometry with calibrated charge-coupled device (CCD) data amounts to that of condensing the intensity values of hundreds, thousands, or even millions of picture elements (pixels) into a list containing the magnitude and position of each star on the CCD image. ... Center an aperture of N A pixels on the star. ... PIXEL.LT.PEAKMAX)) THEN BINGO = .TRUE....

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Listed Since July 15, 1998 . ... 508) 759-2322 . ... 508) 759-9699 . Web Site . ... Web . www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... Planets . ... Stars . ... Barnard found both the fifth Jovian satellite to be discovered, known today as Amalthea, and a vast faint ring of nebulosity in Orion, known as BarnardтАЩs Loop. ... In the 1960s astronomer Peter van de Kamp announced the discovery of two planets in orbit about BarnardтАЩs Star! ... Then another researcher used the same plates as van de Kamp to study another tiny M class red dwarf in Draco called Gliese 793 and found that it and BarnardтАЩs Star appeared to wobble in synch....

... This is a personal project collecting and documenting early images of Harvard College Observatory, focusing on the site at Observatory Hill (previously Summer House Hill). ... This list of references is long in part because each web-based image source is viewed as a separate reference, even though half or more come from Harvard Libraries, through their Visual Information Access (VIA) . ... History of the Harvard College Observatory During the Period 1840-1890. 1890. baker90 . ... The Harvard Crimson...

... The Triplet Lenses are manufactured by LOMO PLC of St. Petersburg Russia, one of the world's largest and most advanced optical manufacturers. ... This day the official web site of St.Petersburg company, lomo.ru, became accessible. ... LOMO VOTING PAPERS PROCESSING COMPLEXES TESTED SUCCESSFULLY . On December 16, 2001 during elections to Legislative Assembly of Leningrad Region, Russia, pilot pieces of the new Voting Papers Processing Complex created at LOMO PLC were used for the first time. ...

... The spectrum of the brightest star, our Sun, shows several dark gaps perpendicular to the flow of it’s colours (figure 1). These so called spectral absorption lines where discovered in 1802 by the English scientist William Wollaston. ... Some stars as Pollux show a spectrum similar to that of our sun with strong Ca II and Fe II lines, others as Sirius or Vega show strong absorption lines of hydrogen, others, as Mira show very complicated spectra due to molecular absorption lines (see figure 5). ...