Could you imagine being that lifeform that cored through the kilometres of ice to finally find an empty space with starlight shining down on you? Alone in a void, the closest celestial being is 10 light years away. Fission could power you for a long time, but rather than looking at the planet as a place fixed, the species could begin to think about where to go. As a planet. They may question whether life on a planet orbiting a sun is even possible (wouldn't it be too hot to form an ice layer?!) but where else could they head?

Fascinating.