Danish astronaut Andreas Mogensen, aboard on ISS, caught an electric view never before taken from space: a huge blue burst of optical activity — known as a blue jet — radiating from a thunderstorm over India. Catching this gorgeous upper atmospheric marvel ended up being the best part of Mogensen's task aboard the ISS. This was the first time ever a blue jet has ever been documented from space. People have been guessing about these "rocket-like" discharges from the tops of thunderclouds for over a century, but it wasn't till 1995 that researchers verified their presence after capturing a sign of these discharges while flying through a thunderstorm over Arkansas.
Blue jets, along with red sprites — a parallel but separate phenomena only just spotted in a picture captured from the ISS — are huge eruptions of electrical discharge spiking upward from storm clouds in the upper atmosphere. Blue jets appear from the electrically-charged centers of thunderstorms and can spike 25 to 30 miles upwards in the shape of a cone. Check out the complete thunder storm — comprehensive with a blue jet, red sprites, and powerful lightning — from Mogensen's vantage point nearly 250 miles above Earth.