Osteoporosis
发表于 2025-3-26 23:32:23
The Infrared Space Observatory (ISO),ially consists of a large cryostat containing about 2300 litres of superfluid helium to maintain the telescope (primary mirror diameter of 60 cm) and the scientific instruments at temperatures between 2K and 8K. A pointing accuracy of a few arc seconds is provided by a three-axis-stabilisation syste
AVID
发表于 2025-3-27 03:16:27
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Filibuster
发表于 2025-3-27 05:17:40
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Digest
发表于 2025-3-27 10:26:56
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胰岛素
发表于 2025-3-27 14:16:51
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独白
发表于 2025-3-27 20:18:41
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抓住他投降
发表于 2025-3-28 01:03:21
Optimised Radiative Cooling of Infrared Space Telescopes and Applications to Possible Missions,t the use of on-board cryogens, and assuming on-orbit cooling after a warm launch. Maximum protection from solar and earth heating, maximum radiating area and efficiency and minimum absorbing area and absorptivity are the obvious basic criteria. The optimised design is a short, fat telescope surroun
constellation
发表于 2025-3-28 02:24:10
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NOTCH
发表于 2025-3-28 08:34:49
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话
发表于 2025-3-28 12:00:33
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