Glen Cozens

Discover the Southern Skies IGlen Cozens, Sydney, New South Wales, AustraliaIF YOU'RE ONE of the matiy peopletraveling to the Southern Hemisphere to view Halley's comet this April, then prepare yourself for another celestial spectacular the southern stars! Any tlark site away from city lights...

Newton, Halley, and the CometOwen Gingerich, Harvard-Smithsonian Center for AstrophysicsIN 1696 Britain faced a coinage crisis.For years the irregular edges of hand-struck coins had been systematically clipped by thieves, who made a precarious living by selling the tiny silver chips. Finally, the...