Derp, i did not realize that the "achievement" sciences would still have prerequisites, funny the things you miss even after a full playthrough.
Making sure to have mined a jellynut as well as a yumako opened up the biochamber and it has now been succesfully researched.
Thanks for the mod and the response, we recently used the mod for our lan party and it was really great that we actually got to see the other planets in our 8 hour Lan instead of just nauvis once again.