Bøger af Martin Griffiths

Re-evaluates the terms of the realism-idealism debate by critically examining the work of Morgenthau, Walz and Bull. Contains summaries of the thinkers' work, valuable to students.

This book contains everything you need to know about variable stars -- stars whose brightness varies noticeably over time.

This book enables anyone with suitable instruments to undertake an examination of nebulae and see or photograph them in detail. Observing Nebulae provides a ready resource to allow anyone with a little experience in astronomy, whether professional or amateur, to locate, identify and record the nebulae in our home galaxy.

Planetary Nebulae and How to Observe Them is for amateur astronomers who want to go beyond the Messier objects, concentrating on one of the most beautiful classes of astronomical objects in the sky. Planetary nebulae are not visible to the naked eye, but they are a fascinating group of telescope objects.