What are these graceful visitors to our skies? We now know that they bring both life and death and teach us about our origins. Comet begins with a breathtaking journey through space astride a comet. Pulitzer Prize-winning astronomer Carl Sagan, author of Cosmos and Contact, and writer Ann Druyan explore the origin, nature, and future of comets, and the exotic myths and portents attached to them. The authors show how comets have spurred some of the great discoveries in the history of science and raise intriguing questions about these brilliant visitors from the interstellar dark. Were the fates of the dinosaurs and the origins of humans tied to the wanderings of a comet? Are comets the building blocks from which worlds are formed? Lavishly illustrated with photographs and specially commissioned full-color paintings, Comet is an enthralling adventure, indispensable for anyone who has ever gazed up at the heavens and wondered why. Praise for Comet "Simply the best." —The Times of London "Fascinating, evocative, inspiring." —The Washington Post "Comet humanizes science. A beautiful, interesting book." —United Press International "Masterful . . . science, poetry, and imagination." —The Atlanta Journal & Constitution

A picture book touching on the impact of moving away from home and how this effects our relationships and sense of belonging, but also how it can open us up to new experiences and allow us to cherish the old ones. "A lovely story to share with anyone who is struggling to find comfort in a new situation." —STARRED REVIEW School Library Journal When Nyla is forced to leave her home in the country to start life again in the city, all she can think about is everything she misses from before. So when a comet comes crashing through the city streets and starts growing into a forest, Nyla can’t resist a chance to head somewhere that feels closer to what she had before ... but what starts as an escape could be just the thing to make her finally feel at home.

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 system bodies. . . . An excellent book.—Space News "The volume is highly recommended to all interested in comets and the Solar System."—Journal of the British Astronomical Association "A good representation of the studies that are currently being done on comets, and it is an extremely good source of information on a wide variety of topics."—International Comet Quarterly "Extremely well-written and informative. . . . A must for library collections."—The Observatory

Pete de Lange must survive as a teenager in a small Natal town during the 1980s, together with his new-found friends, Sarita and Petrus. In a country marked by turmoil and racial conflict, this is not as easy as it seems. Pete and his friends witnessed a horrendous crime, and the perpetrator is on their case. Will justice prevail? In between all of this, Pete must try to make the first rugby team and win the heart of his high-school crush, Renate. This is an excellent Bildungsroman, full of emotion and nostalgia, set in a troubled country where doing the right thing was not always easy.

Provides information on the history of Halley's comet and the best places to view it as well as presenting folklore, a guide to astronomers, and a compendium of poetry and literature about comets

Written by a leading expert on comets, this textbook is divided into seven main elements with a view to allowing advanced students to appreciate the interconnections between the different elements. The author opens with a brief introductory segment on the motivation for studying comets and the overall scope of the book. The first chapter describes fundamental aspects most usually addressed by ground-based observation. The author then looks at the basic physical phenomena in four separate chapters addressing the nucleus, the emitted gas, the emitted dust, and the solar wind interaction. Each chapter introduces the basic physics and chemistry but then new specific measurements by Rosetta instruments at comet Churyumov-Gerasimenko are brought in. A concerted effort has been made to distinguish between established fact and conjecture. Deviations and inconsistencies are brought out and their significance explained. Links to previous observations of comets Tempel 1, Wild 2, Hartley 2, Halley and others are made. The author then closes with three smaller chapters on related objects, the loss of comets, and prospects for future exploration. This textbook includes over 275 graphics and figures – most of which are original. Thorough explanations and derivations are included throughout the chapters. The text is therefore designed to support MSc. students and new PhD students in the field wanting to gain a solid overview of the state-of-the-art.

The Heart of a Comet is a collection of poems and short stories offering the tale of Comet, who fell from the sky unto an unfamiliar plane of existence. On his quest to return home, he has many life-altering encounters with people and places that completely change his perspective of what it means to love and to live. Through this series of truths, the lines between dreams and reality so often blur, this creates a new mosaic to an ultimate revelation: the internal lesson of the true meaning of purpose. What are we here for? Why do we experience the things that we do, and why do we react to them in the ways that we do? All questions posed with seemingly infinite answers. In this conceptual miscellany, author Pages Matam touches on topics of immigrant experience to fatherhood and love in all of its beautiful but also often tragic and traumatic faces. As the tale unfolds, we become swallowed by a self reflective journey with a destination that could only be sought from one's own soul searching heart...the Heart of a Comet.