- 軌道航天技術(shù)
- orbital: adj. 1.【解剖學(xué)】眼窩的。 2.【天文學(xué)】軌道的。 ...
- spaceflight: 宇宙飛行，星際飛行。
- advanced spaceflight: 高級航空技術(shù); 先進(jìn)航天
- astronavigation ; spaceflight: 宇航
- human spaceflight: 太空飛行; 載人航天
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orbital spaceflight中文什么意思
- 軌道航天技術(shù)
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百科釋義
An orbital spaceflight (or orbital flight) is a spaceflight in which a spacecraft is placed on a trajectory where it could remain in space for at least one orbit. To do this around the Earth, it must be on a free trajectory which has an altitude at perigee (altitude at closest approach) above (this is, by at least one convention, the boundary of space).
詳細(xì)百科解釋