Firefly
Firefly

Firefly is a small satellite mission with big plans. The size of a football, Firefly will study the most powerful natural particla accelerator on the Earth...lightning. In addition to the tremendous heat,light, and noise generated near the Earth's surface, lightning can also generate powerful beams of electrons and gamma-rays, which can be observed only by satellites, and which are known as Terrestrial Gamma-ray Flashes (TGFs).