{ "item_title" : "Guide to Comets", "item_author" : [" Patrick Moore "], "item_description" : "A highly informative account of those elusive visitors from space that have mystified man for many centuries. Past civilisations considered comets to be harbingers of disaster or omens of divine intent; military successes and failures were often attributed to the appearance of a comet over the battle field. And in 1456, Pope Calistus III was said to have excommunicated a comet (later charted by and named after Edmond Halley) as an agent of the devilPatrick Moore sets out by explaining the basic structure of a comet and its relation to the rest of the solar system, describing the effects that the planets - especially Jupiter - can have on comets' orbits. The author indicates that anyone with keen eyesight can become a comet hunter, and may be able to contribute information about position, orbit, brightness and periodicity. The book also describes the famous comets of the past: Halley's comet, the first comet to be recognised as periodical; Biela's comet, which split in two and dissolved into a shower of shooting stars; and the recent crop of comets such as Bennett's, Arend-Roland, Ikeyi-Seki, West's, and the great comet disappointment of 1973-4 - Kohoutek. The book is illustrated with explanatory diagrams and photographs, and includes tables of the known periodic comets and a glossary of terms. It will be invaluable for both the amateur astronomer and the casual viewer of the night sky.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/0/71/882/315/071882315X_b.jpg", "price_data" : { "retail_price" : "27.00", "online_price" : "27.00", "our_price" : "27.00", "club_price" : "27.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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