------ Saturn-Seven --------------- + massm +-----------------+ $$$$$ +----7 + $$$$$mmmmmmmm mmmmmmmmmm $$$$$ $$$$$ mmmm $$$$$mmmmm $$$$$mmmmmm $$P $$$$$ aaaaaa$$$$$$ $mmmmmmmm$$$$$ P$$$$$$$$ $$$$ $$$$$ $$$$$ $$b $aaaaaaaa$$$$$ $$$$$ $$$$$ b$$$$$$$$ $$$ $$$ i$$$$$ $$$$$$$$$$ P$$$$a a$ $$$$ $$ $$$$$$ $ $$ $$ $$$$$$ $$$$$ $$$ $$$ b$$$$$$$$i $$$ $ i$$$$$ P$a a$$$ $$$$$ $ $ i$$ $$ $$$$$$$$$$$ $$$$a a$$ $$$$$$$a a$ b$$$$$$$$ $$$$$ $$$$a a$P i$$$$$$$$$$ P$$$$$$$$ $$$ $$$ $$$$$$$$P $$$$$ $a a$ $$$$$$$$b $$$$$$$$$P b$$$$$$P $$ $$i $$$$$$$$b $$$$$ $$$$$ $ $ $$$ $b $$$$$$$$b $$$a a$$$$ $$$$$$$$$$ P$$$ $$$$$ $$ $$ $$$$$$$$$$ $$$$$$$$$$ $$$$ $$$$$ b$$$ $$$$bldSaa aa$bldS$$a a$$$bldS$$$ $$$$$bldS$$$$$$$$$ $$$$$ S $ ----------------------------------------------------------------------+ $a a$m