Kirjahaku

Variable stars are fascinating objects to observe; found all over the sky, they change in brightness over time and can be seen with even the most basic of equipment. Variable star astronomy is one field in which amateur astronomers can still make significant contributions to science and in this highly accessible book David Levy teaches the reader how variable stars work, and how to observe them. Using simple, non-technical terms he explains how to get started with electronic (or CCD) observing, as well as how to observe variable stars through a small telescope or binoculars. Including a section on Southern hemisphere stars, the book covers various types of object that can be observed by amateur astronomers, including more exotic phenomena like gamma ray bursts, blazars, and polars. This book will serve to motivate anyone with even a basic interest in astronomy to begin observing these fascinating objects.

On July 16, 1994 a world-shattering event occurred that would rivet our attention for six explosive days and go on to make history as the single most important celestial event of the century. Comet Shoemaker-Levy 9 crashed into Jupiter, changing forever our understanding of comets and cosmic cataclysms. Our own sense of security would never be the same as the world witnessed fragment after fragment of the comet bash into Jupiter with the collective equivalent force of a 50-million-megaton bomb. David Levy, co-discoverer of periodic Comet Shoemaker-Levy 9, shares his once-in-several-lifetimes' story from the time of the discovery, with Eugene and Carolyn Shoemaker, of this unusual "squashed" comet to the later shocking revelation of hearing that "their" comet was destined to collide with Jupiter. Never in recorded history has a comet created such a catastrophic event as smashing into a planet. Impact Jupiter takes off where David Levy's earlier acclaimed book, The Quest for Comets, left us. Magnificent photos of the impacts, including superb color pictures, accompany David's poetic words, vividly bringing to life his thrilling story. Savor the words of one of the world's most celebrated amateur astronomers as he humbly and eloquently opens the beauty of the heavens to all who are curious.