An instrument in which a mirror is automatically moved so that it reflects sunlight in a constant direction.It is used with a pyrheliometer to make continuous measurements of solar radiation.
定日镜一种仪器,装有一面会自动调控
镜子,以便不断朝某一恒定方向反射日光。
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道纪录片《宇宙》 But while a spacesuit could protect lunar tourists against the vacuum of space, a lack of oxygen, temperature extremes, and lethal solar radiation, a potential hazard that spacesuit would do little to protect against, is high-velocity micro-meteorites.
即使太空服
以对付月
的真空。月
上缺乏氧气、温度极端、还有致命的太阳辐射,但是太空服提供的有限的保护还是无法避免潜在的危险,就是高速的微小陨石。

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