A supernova is when a very big star explodes. Some 8,000 light-years away, the star is on the verge of going supernova, but astronomers can't predict when. Kids Encyclopedia Facts. Supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level. It usually happens when its nuclear fusion cannot hold the core against its own gravity. Join our Space Forums to keep talking space on the latest missions, night sky and more! Crab Nebula, the most famous supernova which occurred on July 5, 1054, was documented by Chinese and Korean astronomers, and was seen above the southern horn of the constellation Taurus. A supernova is when a huge star explodes. This happens when a star runs out of energy to make heat and light, so it collapses, then explodes. The other bright spots are stars of our own galaxy that happen to be in front of the other galaxy. Supernova facts for kids. Supernova - Supernova - Type I supernovae: Type I supernovae can be divided into three subgroups—Ia, Ib, and Ic—on the basis of their spectra. When a star ‘goes supernova,’ considerable amounts of matter may be blasted into space with such a burst of energy as to …
A supernova remnant. The supernova is pointed by the arrow.
Photograph of supernova in another galaxy. Photograph courtesy Jeff Hester, Arizona State University, NASA According to NASA, this “guest star” was said to have stayed in the sky for eight months. When supernovae explode, they jettison matter into space at some 9,000 to 25,000 miles (15,000 to 40,000 kilometers) per second. A 2008 NASA press release announces the observation of a supernova exploding.
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