Can't Unlock Saturn

[(PSN)Graystonefox]

I've completed Earth and Mercury, as I've read that Everest on Earth and the one Apollowhatever on Mercury can unlock Saturn. Unfortunately that hasn't been the case. It's getting frustrating because I'm trying to get to a planet that drops Nano Spores so I can build this darn Incubator Power Core for my Kubrow Egg. I know Neptune drops them but I don't think I can get there either, and I can't unlock Eris atm either.

 

As of now I've completed Earth, Mercury, and Venus. I have Mars and Jupiter available and haven't done any missions on either one of them yet.

 

EDIT: Just read that beating Alad V on Themisto will unlock Saturn. Please tell me this is the case before I spend time going through another planet x__x.

Edited September 1, 2014 by (PS4)Graystonefox