Fred L. Whipple

FOCAL POINTCometary Studies Come of AgeAbout a century ago, Mark Twain . noted with characteristic wit his amusement at the vast range of speculation that can result from a very meager piece of scientific data. Comets have always yielded abundant data but relatively little understanding.Were he...

From the dawn of human history, man has witnessed the phenomenon of the moon rising above the horizon of the earth. For centuries man has dreamed of reversing the perspective, substituting the moon's horizon for that of the earth and the earth for the moon as the planet whose rise is perceived....