Night Sky Observer's Guide Volume 3: The Southern Skies Globes The program is designed to

The program is designed to make the data processing and analysis relatively easy and quick and provides features that allow whole system assessment by inclusion of secondary mirror error and on-axis eyepiece primary spherical aberration

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

and the extensive star-forming region IC 1805

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 The program is designed toBy 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