Supernova is a very powerful radiation explosion. Supernovae can emit solar energy throughout life. When it drifts, the star will release most of the substance. An explosion of supernova also helps to make a new star. Supernova has two trigger modes. The first trigger is that white dwarfs accumulate substances from their colleagues. This caused the dwarfs to reach a central temperature that was too high to survive and caused an explosion.
A supernova is an explosive star that can be divided into two major types depending on the type of exploding star. Ancestry of type Ia supernova (SNIa) is a white dwarf hyperplasia from the companion, while the core collapse supernova ancestors are huge stars at the end of their lives. Supernovae are transient objects. They suddenly appear in a bright star in a random position in the sky (which can go beyond the whole galaxy), it becomes relatively invisible and will never be visible again. Astronomers are currently establishing several supernova explorations, especially to find new supernovae and to obtain rapid and extensive tracking observations of these objects.
Why is it a supernova? Supernova basically decides to erupt with mass emissions of sudden nuclear energy, overcomes its own gravitational pull in core collapse and burns all the remaining energy in every direction in a small corner of the universe inject. In a few months it releases as much energy as any other stars in the galaxy. As a matter of fact, the decline of glory flames is a bit attractive, but the result is not so ... cold, dark, radioactive, sky. Essentially the same, some supernovae will ultimately produce command and control of the black hole.
Every time a big star comes to a lifetime, it explodes a supernova. Without a telescope, the brightest distant supernova seen from the earth is Kepler's supernova. This happens in our own Milky Way Galaxy in the constellation Officius. It was the first discovery in the beginning of 1600 (especially 1604), this is one of the newest supernovae in our galaxy, and it was the first time we could see a supernova explosion without using a telescope. This supernova explosion is very bright even if it happened about 2,000 light years after our planet. It is very bright at peak time, so it can be seen for more than 3 weeks even during the day, so it is brighter than the other stars. However, this supernova is now famous for its controversy.