This drives an expanding shock wave into the surrounding interstellar medium, sweeping up an expanding shell of gas and dust observed as a supernova remnant. These cosmic explosions are responsible for creating the elements that make up the earth and life itself, and they play a critical role in the evolution of galaxies and stars. Supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level
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The term supernova is derived from nova (latin
“new”), the name for another type of exploding star.
A supernova of a star more than about 10 times the size of our sun may leave behind the densest objects in the universe— black holes A supernova is what happens when a star has reached the end of its life and explodes in a brilliant burst of light. Learn how massive stars explode, the types of supernovae, and the famous cosmic events captured by astronomers. If a very nearby star goes supernova, it can genetically alter or possibly even destroy life on earth
Even a fairly distant one often leaves visible wreckage that makes us telescopically gawk at what very much resembles a disastrous event. A supernova is a star's colossal explosion at the end of its life, which can outshine its entire galaxy Read about causes and types of supernovae here. Supernovas are some of the brightest events in the universe, occasionally outshining entire galaxies at their peak
A supernova is not just a star’s death—it is a dramatic event that reshapes the cosmos
