Blader door items (101 in totaal)

Informative, profusely illustrated guide to locating and identifying craters, rills, seas, mountains, other lunar features. Newly revised and updated with special section of new photos. Over 100 photos and diagrams. "Extraordinary delight awaits the…

Un terrien à la surface de la Terre, qui observe le Soleil et la Lune, comment les voit-il ? Voilà le propos de ce livre. Un formalisme simple, une approche « pas à pas », pour répondre à tout ce que vous avez toujours voulu savoir sur le ciel sans…

Here is an informative, up-to-date and well-illustrated guide to planetary observations for amateurs. After chapters on the solar system and the celestial sphere, the text explains how to choose, test and use a telescope with various accessories and…

Binocular Highlights is a tour of 99 different celestial sights — from softly glowing clouds of gas and dust to unusual stars, clumps of stars, and vast star cities (galaxies) — all visible through binoculars. Each object is plotted on a detailed,…

From the Author’s Foreword For most of my observing life the faint outlines of the Milky Way were obscured by light pollution at my home observatory in Pennsylvania. From time to time I would venture forth to truly dark observing sites like the Texas…

Amateur astronomers today are exceptionally fortunate to be living in an era when high quality, and very large, optics are so affordable. In the first half of the 20th century the telescope deluxe for the amateur was the 6-inch refractor. However,…

Amateur astronomers today are exceptionally fortunate to be living in an era when high quality, and very large, optics are so affordable. In the first half of the 20th century the telescope deluxe for the amateur was the 6-inch refractor. However,…