Night Sky Observer's Guide Volume 3: The Southern Skies Globes some still associated with nebulosity

some still associated with nebulosity

” – Larry Mitchell

was perhaps a bit risky

by eliminating the vagaries of shadow cutoff estimation (except at the very edge of a tested mirror)

astronomers were struggling to formulate a workable taxonomy of ""symmetrical"" galaxies using classification schemes such as Edwin Hubble's tuning fork diagram

Night Sky Observer's Guide Volume 3: The Southern Skies Globes some still associated with nebulosityBy George Robert Kepple, Ian Cooper and Jenni Kay 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