A Supernova occur when all of the hydrogen in the core of a huge star in transformed to iron and the explodes. All star die after the nuclear fuel has been exhauted. star with the little massa die gradually, but those with relatively large mass die in a sudden explosion , a supernova. the sudden flash of light can then be followed by several weeks of extremely bright light as twenty million stars.
Supernova are not very common; they occur about once every hundred years in any galaxy, and in 1987 a supernova that could be seen by the naked eye occured in the magellan cloud, a galaxy close to the milky way.
Scientists periodically detect supernova in other galaxies; however , no supernova have occured in the milky way(the galaxy that include earth) since 1604. One very impessive supernova occured in milky way on july 4,1054. There was great explosion followed by three month of lighted skies, and historical chronicles of the time ware full accounts and unusual explanations for the misunderstood phenomenon- many people believed that it meant that the world was coming to an end.
0 komentar:
Post a Comment