mandatory
发表于 2025-3-21 18:31:08
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Benign
发表于 2025-3-21 22:04:31
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Agility
发表于 2025-3-22 03:02:52
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Parley
发表于 2025-3-22 04:41:08
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Trigger-Point
发表于 2025-3-22 11:23:56
The Patrick Moore Practical Astronomy Serieshttp://image.papertrans.cn/b/image/163656.jpg
无法取消
发表于 2025-3-22 14:10:13
Indexzahlen in der Plankostenrechnung,So, you have been told, or have discovered, that the quality of your new acquisition falls more than a little short of what the advertising and the graphics on the box led you to believe. Don’t despair - most inexpensive 60mm (2.4-inch) refractors can be rendered much more useful with the expenditure of some time and a little money.
Tortuous
发表于 2025-3-22 18:48:20
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FLEET
发表于 2025-3-23 00:18:28
,Diskussion nach den Beiträgen , und ,It is probably my imagination, but for years it has seemed to me that most of the really active meteor showers reach their maximum when the Moon is unfavourable, the Sun is above the horizon, or the sky is overcast. But since I began to observe these showers with a small radio telescope, these unfavourable conditions have mattered little to me.
licence
发表于 2025-3-23 03:00:56
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熄灭
发表于 2025-3-23 09:04:11
The “C5++”..The Celestron C5 optical tube assembly (OTA) has been in production since 1971. Since then, the telescope has come in a number of different varieties, with various mounts and accessory options as standard. These include: