 |  |  The Herschel Objects and How to Observe Them (Astronomers' Observing Guides)
Many active amateur astronomers today, having already surveyed the clusters,
nebulae, and galaxies contained in the popular Messier and Caldwell catalogs, are
seeking new horizons to explore with their telescopes. None better can possibly be
found than those discoveries made by the great English astronomer Sir William
Herschel in... |  |  |