尤指植物
发表于 2025-3-21 18:43:50
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谁在削木头
发表于 2025-3-21 23:02:03
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忘川河
发表于 2025-3-22 01:07:26
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SLAG
发表于 2025-3-22 07:07:32
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minion
发表于 2025-3-22 10:05:38
David ArdittiHelps you decide whether you really need an observatory, what type you should choose, where you should put it.Hints on how to get family and neighbors to agree to it.Helps making the most costly decis
身心疲惫
发表于 2025-3-22 15:58:32
Book 2008to chooseatelescope,howtoconstructanobservatoryforit,andhowtomakethe bestofitwhencompleted. Astronomyisthebestofallhobbies;itcantakeupasmuchtimeasyoulike– or as little. In any case, you will make many friends, and give yourself endless enjoyment. Tobeaproper“astronomer”youneedanobservatory,andthisbo
arthroplasty
发表于 2025-3-22 20:35:30
1431-9756neighbors to agree to it.Helps making the most costly decisTwo books in this series, Small Astronomical Observatories, have been widely read and used. This new book by David Arditti gives the full story – how to chooseatelescope,howtoconstructanobservatoryforit,andhowtomakethe bestofitwhencompleted
evasive
发表于 2025-3-22 21:17:30
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companion
发表于 2025-3-23 03:56:30
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侵蚀
发表于 2025-3-23 06:06:01
Setting-Up a Small Observatory: From Concept to Construction