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Supernova - Wikipedia Supernovae can expel several solar masses of material at speeds up to several percent of the speed of light 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
Supernova | Definition, Types, Facts | Britannica supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level The term supernova is derived from nova (Latin: “new”), the name for another type of exploding star
What Is a Supernova? | NASA Space Place – NASA Science for Kids 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 The Crab Nebula is the leftover, or remnant, of a massive star in our Milky Way that died 6,500 light-years away
What Is a Supernova? - Space A supernova is what happens when a star has reached the end of its life and explodes in a brilliant burst of light
Supernovas Remnants - Harvard–Smithsonian Center for Astrophysics Supernovas are some of the brightest events in the universe, occasionally outshining entire galaxies at their peak Many supernovas can be seen from billions of light-years away, and nearby supernovas in past centuries have been visible during the daytime
What is a Supernova? Exploring the Explosive Death of Stars and Its . . . A supernova is not just a star’s death—it is a dramatic event that reshapes the cosmos 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
What is a supernova? - EarthSky 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
Supernova - Definition Detailed Explanation - Astronomical Phenomena . . . A supernova is a powerful and catastrophic event that occurs when a star explodes, releasing an immense amount of energy into space This explosion can briefly outshine an entire galaxy and is one of the most energetic events in the universe