sinned lll

i had a some different situation in a normal difficulty game, gigantic map with all the races. one of the race expanded so fast that 70% of the map is conquared by that race in 5 years and no war happened.

in my first game, i found that i can only colonize a small number of the planets on the map, i just would like to know what some planets labled "uninhabitable" for?? are they just some decorations like starts in the background or have i missed something?

the link at the website doesnt work, i dont know what to do now