This 1953 book sets out some observational facts about comets and then accounts for their origin and explains how comet tails are formed.

This volume considers the role comets may have played in the origins and evolution of life. This is the only book dealing in depth with this subject. It is part

Over forty authorities present sections on the nucleus, dust, coma, and tails of comets, along with sections on their origin, and relationships to other solar s

Since several decades, comets have been considered as key witnesses of solar system formation. Their nature has been explored using the modern arsenal of Earth-