Night Sky Observer's Guide Volume 4: The Glories of the Milky Way to –54° Annals of the Deep Sky astronomers were struggling to formulate

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

By Bob King

The Arp Atlas of Peculiar Galaxies: A Chronicle and Observer's GuideIn 1966

the peculiarities of nearly 20 Arp galaxies can be detected

This is the next step up from our Pocket Sky Atlas – and a must for every serious telescope user

Night Sky Observer's Guide Volume 4: The Glories of the Milky Way to –54° Annals of the Deep Sky astronomers were struggling to formulateBy 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