Known as: child care helmet "supernova" explosion 150 years time.

<P> Key words: supernova Recently, scientists have discovered a new supernova, called the "nursery of the helmet" (child care, Thor, the Nordic legend, Scandinavian Thor's name is Thor). .From the photos point of view, the supernova has a "Thor's wings", from its center to the edge of the actual 30 light years, is a huge volume of stars. .And this in a supernova about to break out the current state of, you know supernova event is only occur once every 150 years. .World Scientific reports http://tech. </ P> <P> supernova is a rare astronomical phenomenon. .This outbreak only one quasar, but the outbreak of the process in the supernova energy released is huge, about 10 times Star, of which about 1% of the energy radiated in the form of photoelectron. .In the outbreak, the brightness of the sun supernova 2 10 to 500 million times. .Therefore, the scientists under the brightness of supernova explosions of strength, the two types of supernovae: I type and II type. .I-II-type than the one about 10 times brighter. .I supernovae and by analyzing their spectral characteristics are divided into a, b, c three categories. .Nova explosions recorded stone thousands of years ago (Figure) | </ P> <P> but found impending supernova is very casual and lucky. .In the Milky Way, according to estimates there are about 20-50 times the current annual outbreaks star, and supernova event is only occur once every 150 years! .Especially since the outbreak of the mechanism is different, the final fate of the supernova are different. .Type Ia supernova explosion completely destroyed the entire planet, all of the material spilled all to the vast universe; the other three types of supernovae are likely to have left a dense core: neutron stars or black holes. .Only a small part of the last star to become a superstar, and similar, the frequency of supernova is much smaller than its "cousin" star. .</ P> <P> supernovae are "life" late into the dying stages of the last supernatural power, and scientists can measure the distance by type Ia supernovae to determine the apparent brightness of the galaxy where the supernova distance. .The last century, a group of U.S. scientists is set using this method a number of very distant galaxies, the distance and came to the accelerating expansion of the universe is too amazing conclusion! .</ P> <P> Although supernovae are rare, but it is essential that we study the universe. .After the birth of the universe can only generate the first of several protons of hydrogen to boron that very few of the elements; proton number more elements can only be produced by the subsequent formation of stars; those elements of the proton number greater than iron in a supernova can only be ."Forging" out of such elements include things like gold, silver, precious metals like platinum elements. .It is no exaggeration to say that if there is no outbreak of supernovae, those metals into the interstellar space broadcast, there can be the sun, the earth, that it is impossible for the birth of life and our human existence. .</ P> <P> However, the close of the supernova is also dangerous. .Assuming Vega (about 26 light years away from us) that there is one position above the supernova explosion, then it releases the energy of gamma photons and other particles will penetrate the atmosphere to kill all life on Earth. .Fortunately, we are not close to 200 light-years or less massive stars, so even if there are other parts of the Milky Way supernova is also not threaten the Earth. .</ P> </ p>.