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???? ????? ????????? ??????????? ?????? (International Astronomical Union) ?? ????? ???? ?????(Celestial) ????? ??? ???? ????? ?? ????? ?????? ??? ??? ????? ?? ???? ????? ??? ?

1- ??? ??? ???? ?? ????? ???? ? ???? ?

2- ??? ???? ??? ???? ??? ???? ? ???? ????? ???? ?? ??? ???? ????? (rigid body forces) ?? ???? ?? ??? ?? ????F ?? ??????? ????? (hydrostatic equilibrium) ??? ?? ?????? ??? ??? ???? ??? ?????? ?? ???? ???? ?

3- ???? ???? ???? ?? ?????? ? ????? (Cleaning the neighbourhood) ?? ??????? ???? ?

4- ??? ?? ?????? (satellite) ?? ?????

????? ????? ?????? ? 2006? ?? ?? ?? 9??? ?????? ????? ????? ????? ?? 2006? ? ??? ??? ???? ????? ???? ????? ????? ?? ??? ?????? ????? ????? ?? ? ?? ??? ??? ?????? ???? ?? ?

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