The Universe is all of time and space and its contents. It includes planets, moons, minor planets, stars, galaxies, the contents of intergalactic space, and all matter and energy. The observable universe is about 91 billion light-years in diameter. The size of the entire Universe is unknown.
The word universe derives from the Old French word univers, which in turn derives from the Latin word universum.
What How Why
An electric current is a passage of electrons from one electrified body to another which is less charged. When too many electrons are generated, they can move.