indemnify
发表于 2025-3-26 21:24:50
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opalescence
发表于 2025-3-27 02:40:11
Neil EnglishA recent upsurge in sales of commercially-made Dobsonians make this book very timely.Includes speculation on how Dobsonians will change and improve in the future.Contains many practical and useful hin
Regurgitation
发表于 2025-3-27 09:06:14
The Patrick Moore Practical Astronomy Serieshttp://image.papertrans.cn/c/image/226184.jpg
Genistein
发表于 2025-3-27 12:56:30
Choosing and Using a Dobsonian Telescope978-1-4419-8786-0Series ISSN 1431-9756 Series E-ISSN 2197-6562
fixed-joint
发表于 2025-3-27 15:32:51
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衰老
发表于 2025-3-27 21:08:40
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Pantry
发表于 2025-3-27 23:44:46
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judicial
发表于 2025-3-28 05:03:40
1431-9756 improve in the future.Contains many practical and useful hinIn the 1960‘s, American amateur astronomer, John Dobson, designed a revolutionary kind of astronomical telescope featuring a lightweight large-aperture reflecting system on a simple mounting, using the then-revolutionary material called tef
vitreous-humor
发表于 2025-3-28 08:11:52
https://doi.org/10.1007/978-3-8348-9169-3 chapter will discuss everything you need to know about how your Newtonian works. On our road to understanding, we’ll be dipping in and out of history to record the key events that shaped the evolution of the Newtonian into its quintessentially modern form.
控制
发表于 2025-3-28 12:49:14
,Lösungen zu den Lernkontrollen, to set up and cool down fast enough to make observations worthwhile on most clear nights. Many diehard observers reckon an 8-inch or 10-inch (20- or 35-cm) Dobsonian comes pretty darn close to that ideal for reasons that we will supply in this chapter.