揉杂
发表于 2025-3-23 11:30:53
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LANCE
发表于 2025-3-23 16:21:31
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心胸狭窄
发表于 2025-3-23 21:33:09
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制造
发表于 2025-3-24 02:01:36
Book 2002eatures to observe and observing programmes to follow. So much energy comes from the Sun that by failing to observe safe working practices it is possible to damage your eyes or equipment. The care that is needed is emphasised throughout the book. Always make sure that you have read the whole of a se
补充
发表于 2025-3-24 02:21:16
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缓和
发表于 2025-3-24 09:11:38
General Telescopic Observing Techniques, blankets, aluminised helium balloons, potato crisp packets, floppy disks, smoked plastic, crossed Polaroid filters, sunglasses, mirrors, medical X-rays or almost any other of the items that may be suggested from time to time as a substitute for the filters discussed below, to act as a reliable filt
FLIRT
发表于 2025-3-24 14:01:28
Observing Programmes,r greater interest. Three possible observing programmes are suggested here. There are many others possible, and anyone with a serious interest in solar work is advised to contact and perhaps join the solar section of their national astronomical society. These often have on-going programmes with many
saturated-fat
发表于 2025-3-24 18:17:07
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A保存的
发表于 2025-3-24 21:21:44
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murmur
发表于 2025-3-25 02:42:46
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