At first it seems weird that time should spin. We seem to like (in English at least) to describe whatever it is that time does in terms of movement in space, true, but the word that springs to my mind first is ‘flows’.
It is very appropriate that time should spin here, though, for at least two reasons. Firstly this is a Galactic story, and galaxies are prone to spinning. Secondly the Legend‘s most overt message (which opens the episodes of its second season) says that in one important respect time does not progress: ‘the deeds of men remain the same.’ If we’re doomed to repeat the same mistakes then idea that time flows begins to look a bit odd.
To my amusement, I’m reminded of the opening statements of something else I’m fond of.