Supernova
Supernova is the explosion of a star in the galaxy that emits more energy than nova. This supernova event marked the end of a history of a star. Which experienced a supernova star will appear very bright and even kecemerlangannya could reach hundreds of millions times the original starlight, a few weeks or months before experiencing a supernova star star will release energy equivalent to solar energy that the sun is released in her life, this explosion demolish most of the star material at a speed of 30,000 km / s (10% speed of light) and releases shock waves that can destroy the interstellar medium.

There are several types of supernova. Type I and II can be triggered by one of two ways, either stop or activate the production of energy through nuclear fusion. After the core of old stars stop producing energy, the star will experience gravitational collapse of a sudden become a black hole or neutron star, and releasing gravitational potential energy that heats and destroys the outer layers of the star.

On average, supernovae occur once every 50 years in the size of the Milky Way galaxy. Supernova has a role in enriching the interstellar medium with elements of the larger mass. Furthermore, the shock waves from supernova explosions is able to form a new star formation.