Kosmicheskie skorosti
[glossarii]
Pervaya kosmicheskaya skorost', ili krugovaya skorost' V1 - skorost', neobhodimaya dlya obrasheniya sputnika po krugovoi orbite vokrug Zemli ili drugogo kosmicheskogo ob'ekta. Esli R - radius orbity, a G - gravitacionnaya postoyannaya, to V1 = (GM/R)1/2. Dlya Zemli V1=7.9 km/s.
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