???????? ?????

???????? ????? (space flight) ???????? ??? ??????? ???? ?????????? ????? ???? ??? ???????? ????? ??? ???????? ????? ?? ?????? ???? ??, ?? ????-???? ?? ????-???? ?? ???? ???? ?????? ???????? ????? ??? ??????? ?????? ??? ?? ????? ????? ?????? ????????? ?? ?????? ??? (?? ???? ??? ?? ??? ??? ) ?????? ??????? ?????? ????????? ????? ???? ????-???? ???????? ????? ??? ?????? ?? ????? ??? ???????? ???? ??????? ?????? ??? ?????? ?? ????? ?????? ???? ?????? , ????????????? ? ???????? ?? ?? ???? ???? ???? ?? ??????? ???? ???????? ??? ??? ????? ???? ^[1]^[2]

?????? ?? ????? [ ??????? ???? ]

↑ Escape Velocity of Earth. Van.physics.uiuc.edu. Retrieved on 2011-10-05.
↑ Lance K. Erickson (2010). Space Flight: History, Technology, and Operations. Government Institutes. p. 187.