? ???????? ??? ???(43·???)?? ?? ??? ??? ???(17·????)?? ??? ???. ?? ??? ????? ???(?? ?? ??) ???(?? ??)?, ?????? ???(????? ???)?? ???. ??? ????? ???(M51 ?? ??) ???(??? ???) ???(???? ??)?? ?????? ???(??)?? ????.
??? 9??? ?? ????????? ? 57?? ??? ???? ??? ???, ?? ?? ???? ?? ??? ??? ???. ??? ??? ???? 4??? ??? ??????? ??????? ????? ????.
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