Big Christmas tree
Moderator: Moderators
Big Christmas tree
Post #1With their energy output comparable to that of a small star, they should be visible from space. A Type II civilization may even build a gigantic sphere around their star to more efficiently utilize its total energy output. Even if they try to conceal their existence, they must, by the Second Law of Thermodynamics, emit waste heat. From outer space, their planet may glow like a Christmas tree ornament.