that was naru
i was thinking maybe we like provided our own heat, or had a brown dwarf dorf at the center under a metallic core:
Darvink, the A type star flickered. All around Universalis, fingers and paws alike pointed upwards. Then it exploded. In seconds, a force field of energy was raised, protecting and collecting at the same time. Thousands of years later, the blue light surrounding Universalis faded, leaving Universalis with no Star. The smartests scientists from all around the world gathered, planning how to deal with this problem. Finally, Dan Dixon thought of an idea: Mine out our core and place and artificial heat source inside. Universalis was so advance, they did. One it was stable in millions of years, they contacted Magrathea, and had them fix up their handy work. All was well, in an self-supporting world, floating around space time.