coagulate
发表于 2025-3-23 12:34:31
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该得
发表于 2025-3-23 14:44:30
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nonradioactive
发表于 2025-3-23 21:27:26
David RatledgeEach Caldwell object is on a double-page spread, practical for field use.For every object there is: - A photographic image; - Full technical information; - A finder chart (with TelradTM circles; - Sta
GOUGE
发表于 2025-3-23 23:01:59
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有毛就脱毛
发表于 2025-3-24 04:53:24
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armistice
发表于 2025-3-24 07:21:43
Introduction,of Messier’s objects was nothing more profound than they might be confused for a comet! There must be a better way to choose the best deep sky objects for the modern era. It was time for a fresh approach.
minion
发表于 2025-3-24 14:10:12
information; - A finder chart (with TelradTM circles; - StaBackground A new collection of deep sky targets for the modern amateur astronomer was long overdue. The traditional catalogue of deep sky objects, i.e. that produced by Messier over 200 years ago, has become a victim of its own success. Tho
Cytology
发表于 2025-3-24 15:35:25
Book 2000. that produced by Messier over 200 years ago, has become a victim of its own success. Those objects have now become far too well known, over-viewed, over-imaged and over-published. More importantly they have often resulted in more interesting objects being totally overlooked. The logic behind the c
苍白
发表于 2025-3-24 19:19:20
6楼
Infelicity
发表于 2025-3-25 01:47:19
6楼