Well according to the Frederick Brown story "Placet is a Crazy Place".
I am not sure I would want to live in a system with a Contra Terrene star in addition to the normal one, but maybe they haven't implemented that in game.
Planets 1 and 2 have been given hand-made names, "Placet A" and "Placet B". Sounds to me like it might have been hand-made content, for some as-yet-unknown reason.