hangdog
发表于 2025-3-23 11:45:50
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克制
发表于 2025-3-23 16:26:25
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BLANC
发表于 2025-3-23 21:38:18
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lethargy
发表于 2025-3-23 22:51:39
Fraktale Geometrie — Eine Einführungoney for a year, I could just afford a 60 mm refractor! Saving my pocket money for more than a year was beyond my comprehension and a 60 mm refractor was, to me, a dream telescope, sitting in the window of the local photographic store. To non-astronomers, a telescope . a refractor!
无能性
发表于 2025-3-24 04:36:47
Die Geschichte der , in Frankreich you get with that?”. Photographs of the Moon produce the same response. If I’m in a picky mood, my unhelpful response might be, “Well… that crater is about sixty miles across and it’s only an inch across on the print, so it’s a . and not a magnification”
同步信息
发表于 2025-3-24 07:07:06
Die Geschichte der , in FrankreichRefracting telescopes (“refractors”) focus light by using a lens (or “object glass”, or “objective”) as shown in Figure 2.1.
翻动
发表于 2025-3-24 11:58:00
Hervé Marchal,Jean-Marc Stébé,Marc BertierSchmidt-Cassegrains are often referred to as ., a term applied to telescopes which use a mixture of mirrors and lenses to form the image at the focal plane.
相反放置
发表于 2025-3-24 17:53:06
Achtung! „Sensible Urbane Zone“To most beginners in Astronomy, binoculars seem at first to be of very limited use. Surely a telescope is what is required to enjoy astronomy or do useful scientific work? Nothing could be further from the truth.
Tempor
发表于 2025-3-24 22:40:40
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podiatrist
发表于 2025-3-25 01:43:09
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