The earth absorbs heat and still enjoys significant internal heat sources (is volcanic ally active). (globalclimatescam.com)
Neptune's own internal heat source — heat generated by the gravitational compression of gases — may be the weather engine. (discovermagazine.com)
As nitrogen ice on the surface of the plain cools, it recedes, only to be replaced by a rising blob of nitrogen that has been warmed by Pluto's meagre internal heat source. (newatlas.com)