Download or read book Comet Halley written by Mark Littmann and published by . This book was released on 1985 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Follows the comet through one full 7.6 billion mile circuit, explores history leading to present understanding of comets, emphasizes the work of Edmond Halley, and discusses the current theories of comet origin.