Awesome Nebulae ! What Nebulae ? You never seen it before ! This is really awesome ! A nebula (plural: nebulae) is a huge cloud of gas and dust in space. Nebulae are some of the most beautiful and important structures in the universe because they are the birthplaces of stars and sometimes the remains of dead stars. A nebula is a massive collection of: Hydrogen gas (mostly) Helium Cosmic dust Ionized gases that glow in different colors Nebulae can be light-years wide — far bigger than entire sola