Hi everyone,
I have a question please anyone answer it,
I have a friend who had 17 colony but suddenly all his colonies went, it became uncolonized planets and when i asked him he said it slots were less than "300 plus slots", what does that mean??

Planets are ranked on size by how many fields (slots) they have to build on. Some planets have over 450 fields and allow the user to build lots of things on them. Anything less than 300 slots is considered small.

Indeed, what your friend probably did was abandon his colonies because he considered them too small.

-Istalris-