Night Sky Observer's Guide Volume 4: The Glories of the Milky Way to –54° Willmann-Bell as perceived through the eyepiece)

as perceived through the eyepiece)

Transits of Mercury are somewhat more frequent — 117 occur during the 700 year period +1600 to 2300

From Richard Berry's Foreword to the Second Edition:

By giving its readers a simple

Night Sky Observer's Guide Volume 4: The Glories of the Milky Way to –54° Willmann-Bell as perceived through the eyepiece)By George Robert Kepple. The original purpose of The Night Sky Observers Guide was to close the gap between observing literature and modern optics. It provided the owner of a medium or large aperture telescope with some idea of what to look for in such instruments both what objects can be seen, and what details may be seen within these objects. Now, with four volumes, it has become an indispensable resource for observing. The Night Sky Observers Guide