... Building Museum Quality Replicas of Galileo's Telescopes . ... This month's meeting will feature Jim and Rhoda Morris speaking on their replicas of Galileo's telescopes. ... With their background as physicist and chemist and their experimental skills the authors set about to make the most accurate replicas of these telescopes in existence today. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Astrophysics Group . ... MRAO Telescopes . COAST . COAST A Gentle Introduction . ... The limitations of current technology mean that the largest optical telescopes produced today have collecting mirrors up to 10m in diameter. ... The larger the mirror, the further apart these parts can be, and the sharper the resulting image. One of the most amazing developments in optics this century was the realization that not all the pieces of the telescope mirror need be present at the same time! ...

... OTHER STUFF | ... and also: Helmut Jerjen ( Basel ) 1995 Bruno Binggeli ( Basel ) 1981 Alan Sandage (Caltech) 1953 Edwin Hubble (Chicago) 1917 Edwin B Frost (Potsdam) 1890 Hermann Vogel (Jena) 1868 Johann Karl Friedrich Z llner ( Basel ) 1859 Gustav Heinrich Wiedemann (Berlin) 1847 Heinrich Gustav Magnus (Berlin) 1827 Eilhard Mitscherlich (G ttingen) 1814 Friedrich Stromeyer (G ttingen) 1800 Johann Friedrich Gmelin (T bingen ) 1768 Phillip Friedrich Gmelin (T ...

C C C C C C lass lass lass lass lass lass 1 2 3 4 5 6 Introduction, Background Solar System Stars Galaxies Cosmology Special Topics Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light T lescopes e 1. ... Kirchoff's Laws trum Emission Line Spectrum 2. A low-density, hot gas emits light whose spectrum consists of a series of bright emission lines. ... Absorption Spectrum 3. ...

Supernova discovery statistics for 1999 . ... Sorted by Name For the year 1999 , 198 supernovae and 11 extragalactic novae were reported. 198 of these supernovae were named by CBAT, 0 were given possible supernova designations, and 0 were not reported to CBAT. 49 supernovae were found in NGC/IC galaxies, 84 were found in named galaxies 64 objects were discovered by amateurs 0 were brighter than 13th Magnitude 21 were brighter than 16th Magnitude 65 were brighter than 18th Magnitude 115 ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... StarNavigator Series . ... These telescopes come with all necessary equipment in the box and feature an altazimuth mount that allows for easy and quick viewing. ... StarNavigator 130mm Altazimuth Reflector with AudioStar . ... Meade StarNavigator 130mm reflecting telescope #20130. ... The StarNavigator 130mm reflecting telescope features a lens diameter of 130mm (5.1") for clear, bright images and a focal length of 1000mm; focal ratio f/7.7. ...

Next: CCD Operation Up: Charge Coupled Devices (CCDs) Previous: Charge Coupled Devices (CCDs) . ... However it is only now that a number of important X-ray astronomical applications of CCDs have reached critical development stages, so that this is an appropriate time to review the application of space-borne CCD instruments to cosmic X-ray astronomy, and highlight the particular concerns which are being addressed for X-ray instruments, as distinct from optical applications. ...

... ARC 3.5m | ... 2.1 Choosing and Exposure Time . 2.2 Choosing the CCD Gain . ... 3.2 Read Times and Read Noise . ... At the slow read rate of 100 KHz to be used for exposure times longer than a few seconds, we determine an average read noise of order 3.7 ? ... Table 2: Exposure time must be greater than the readout time by at least 0.03 s. The Agile CCD camera has two readout amplifiers, one of which is capable of reading at the fast readrate of 1MHz while introducing a read noise of order 7 ? ...

... 2015 - 2016 . ... Eugene Higgins Professor of Astrophysics, Princeton University . ... December 8, 2015 . ... November 10, 2015 . ... University of the Sciences in Philadelphia author . ... Amateur Astronomer . ... 2014 - 2015 . ... June 9, 2015 . ... Digital Planetarium and the 2012 Transit of Venus from Hawaii . 2013 - 2014 . ... International Occultation Timing Association . ... 2012 - 2013 . ... 2011 - 2012 . ... Princeton University . ... Amateur Astronomers Association of Princeton, Inc., ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Irvin M. Winer . ... Site . ... Winer . ... Site Map . Contact Us . If you would like to discuss options for you to work with Winer, you can: . ... Fill in the form below with your request and we will endeavour to contact you about your enquiry. ... Sonoita . Arizona 85637-0797 . USA . ... P.O. Box 797 . ... 2013 Winer Observatory. ...