Red sprites and blue jets are both atmospheric and electrical phenomena that take place in the upper atmosphere. They take place above normal lightning; Blue jets happen in cone shapes above thunderstorm clouds, and are not related to lightning. They’re blue due to ionised emissions from nitrogen. Red sprites can appear as different shapes and have hanging tendrils. They occur when positive lightning goes from the cloud to the ground.
Lightning occurs due to the electrical shift from a negative charge to the positive charge. According to the limits of physics, lightning is the leap of sparks between these two giant masses with different electric field. http://englishkidzone.com/how-does-lightning-occurs/
Fulgurite = Latin word ‘fulgur’ which means thunderbolt. Fulgurite is created when lightning strikes sand. The high temperature of lightning, air-temperatures over 30,000 °C have been measured, is far higher than the sand melting point of 1800 °C. The silica that sand is made up of fuses together, creating the so-called lightning glass or lightning sand.
Lightning in space: A single bolt of lightning is 50 percent longer than the entire Milky Way galaxy.Scientists have observed lightning on Mars and Saturn but didn't know that lightning could occur in the middle of space, with a force equal to a trillion lightning bolts, or to use the proper scientific terms, 50 million tons of electricity. This insane electrical current was discovered near galaxy 3C303 firing a massive jet of electrified matter 150,000 light-years into outer space.