umeinander kreisen
to circle around each other
to circle around one another
to circulate around each other
to circulate around one another
to orbit around each other
to orbit around one another
to orbit in a circle around each other
to orbit in a circle around one another
to revolve around each other
to revolve around one another
to revolve round each other
to revolve round one another
to rotate around each other
to rotate around one another