It is clear to everyone that astronomy at all events compels the soul to look upwards,
and draws it from the things of this world to the other.
- Plato
CSOG is published in loving memory of my father. He traded earth for eternity less than 24 hours after CSOG was first published. We miss him dearly.
Images used in the Clear Skies Observing Guides are Space Telescope Science Institute Digitized Sky Survey First and Second Generation images (STScl DSS).
Northern sky images: Courtesy of Caltech.
Southern sky images: Use of these images is courtesy of the UK Schmidt Telescope (copyright in which is owned by the Science and Technology Facilities Council of the UK and the Anglo-Australian Telescope Board) and the Digitized Sky Survey created by the Space Telescope Science Institute, operated by AURA, Inc, for NASA, and are reproduced here with permission from the Royal Observatory Edinburgh.
SDSS Images: the Sloan Digital Sky Survey.
This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.
This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
This research has made use of "Aladin sky atlas" developed at CDS, Strasbourg Observatory, France.
This research has made use of the Washington Double Star Catalog maintained at the U.S. Naval Observatory.
Jan Weis' F.G.W. Struve's Double Stars.
Paul Rodman's unsurpassed AstroPlanner - Software for astronomical observation planning.
Frank Sperl for the Mitty wedge. Rest in peace, Frank.
Sky Atlas 2000.0 Companion, 2ND Edition by Robert A. Strong and Roger W. Sinnott, for information on concentration and brightness of stars in star clusters and for descriptions of galactic nuclei.
New General Catalogue of Nebulae and Clusters of Stars - J.L.E. Dreyer.
Glen Cozens of Casino, NSW, Australia, for his work on the Dunlop catalogue.
Mark Bratton's Complete Guide to the Herschel Objects, for galaxy diameters.
The members of Deep Sky Forum.
Robert Burnham, Jr. for his inspiration.
Daniëlle, for everything.
Fellow observers and astrophotographers I had the privilege of meeting under clear skies.
Dedicated to stargazers around the world observing the sky in the spirit of exploration and discovery. Keep looking up.