At the poles, more heat radiates out into space than is absorbed from the sun.
Rocket Lab launches NASA cubesat to study heat lost from Earth's poles
"The PREFIRE duo "will criss-cross over the #Arctic and #Antarctica measuring thermal infrared radiation — the same type of energy emitted from a heat lamp — that will make #climate models more accurate and help predict changes caused by #GlobalWarming," Rocket Lab wrote in a mission description."