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When some stars enter their final stage of life they throw out material into space in a supernova. Here's a representation of how they work.
A supernova is an explosion of a massive supergiant star. It may shine with the brightness of 10 billion suns! The total energy output may be 10^44 joules, as much as the total output of the sun ...
A quick journey through the different stages in a star's life, from nebula to supernova.
The supernova which produced the Crab Nebula was observed by the Chinese in 1054 AD. It is positioned in the constellation Taurus and is about 1 kiloparsecs away from Earth. The nebula has been a ...
Brief introduction from NASA on the nature of neutron stars, the most dense objects known, created in the cores of massive stars during supernova explosions. Includes links to related topics.