first cosmic velocity
A country in Oceania. Official name: Independent State of Papua New Guinea.
The velocity of a circular orbit.
Of or pertaining to magnetostatics
(Britain) A short-duration outing by coach to a destination that is not revealed in advance
人工衛星を安定した軌道に投入するため、科学者たちはその高度で必要な円軌道の速度（第一宇宙速度）を計算した。
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