Supernova - a dying star
Right now you can see something as rare as a supernova in the Great Bear constellation. A supernova is a dying star's final demise in a massive explosion.
explosion formed when a dying star is no longer able to sustain its own weight, leading to the collapse. When the star explodes released vast amounts of energy it would take millions of years for the star to deliver normally. It will therefore make a very strong brightness, which can be upwards of one hundred billion times brighter than our sun. Short term it may actually outshine an entire galaxy.
Most supernovae are not detected as far out into the universe and is often hidden by dust and gas, but this supernova is only about 20 million light years from Earth. Which of space standards are not very far away. As an aside can be mentioned that it would become a supernova within 100-200 light years from Earth, it actually could mean end of the world.
The supernova was discovered on August 24 this year (2011) and has since shone stronger. Right now, a week ahead calls for the most likely at their strongest as the one who has a telescope at home really should take the opportunity to take a look at this fascinating spectacle.
word nova meaning new comes in from Tycho Brahe's book "De nova stella" from 1573. He thought he saw a new star being born, but in fact it was a star that suddenly lit up. Inutid call therefore a less bright outburst from a star nova and a full-scale explosion of the supernova.
Article by Aurora