Follow the progress of constellations throughout the seasons with this companion to the night sky, written and illustrated by astronomical experts, Radmila Topalovic and Wil Tirion, and approved by astronomers at the Royal Observatory Greenwich. Month-by-month calendars and maps enable you to chart lunar phases, discover events that light up the sky for brief periods, and explore the rich tapestry of characters overhead. Provides worldwide coverage with fascinating celestial facts and notable astronomical anniversaries.