I think my planet become the universe. Literally. It has infinite mass and is continually growing, theoretically of course. The game stopped comprehending it with an image somewhere around once it's size could be given a mass number that exceeded one e to the power of 10.
 "Aurora"){kind=icon}
 "Creeper World 2: Academy"){kind=icon}
 "Dibbles 2: Winter Woes"){kind=icon}