Blader door items (45 in totaal)

Featuring a collection of models to make, they tell the time from the sun during the day and the moon at night. Another mimics the motion of the sun and moon across the sky on any day of the year. The moon globe names all the seas, craters and…

This is an extensively revised, updated and enlarged edition of Dr Steel's popular textbook on interferometry. The book provides a general treatment that brings together the many different applications of the interference of electromagnetic waves.…

This book is an compilation of articles from the newsletter "Maksutov Circulars", a telescope building organization dedicated originally to building Maksutov telscopes, an original, creative idea for telescope design largely fallen out of favor due…

This book is an compilation of articles from the newsletter "Maksutov Circulars", a telescope building organization dedicated originally to building Maksutov telscopes, an original, creative idea for telescope design largely fallen out of favor due…

Many amateur astronomers make their own instruments, either because of financial considerations or because they are just interested. Amateur Telescope Making offers a variety of designs for telescopes, mounts and drives which are suitable for the…

Many observers harbor misgivings about their telescope. The manufacturer may have guaranteed accuracy to one-quarter wavelength or as diffraction-limited but most telescope users have, at best, only a hazy idea of how to personally verifying such…

This book tells how you can build a state-of-the-art Dobsonian telescope using readily available materials and supplies. Every step of construction is detailedin photographs and diagrams, and the underlying ideas are carefully explained. As a result…