Supernova periastron, Supernovas are some of the brightest events in the universe, occasionally outshining entire galaxies at their peak. : supernovae) is a powerful and luminous explosion of a star. The Crab Nebula is the leftover, or remnant, of a massive star in our Milky Way that died 6,500 light-years away. Read about causes and types of supernovae here. . Jan 20, 2026 · 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. Oct 3, 2025 · What is a supernova explained simply? Learn how stars explode, the types of supernovae, what they leave behind, and the most famous supernovae in history. A supernova can light the sky up for weeks, and the massive transfer of matter and energy leaves behind a very different star. Many supernovas can be seen from billions of light-years away, and nearby supernovas in past centuries have been visible during the daytime. A supernova (pl. The term supernova is derived from nova (Latin: “new”), the name for another type of exploding star. Jun 19, 2023 · A supernova is what happens when a star has reached the end of its life and explodes in a brilliant burst of light. A supernova (pl. 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. Feb 17, 2026 · supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. What is a supernova? Learn how massive stars explode, the types of supernovae, and the famous cosmic events captured by astronomers. Mar 30, 2025 · A supernova is not just a star’s death—it is a dramatic event that reshapes the cosmos. Nov 12, 2020 · A supernova is a star's colossal explosion at the end of its life, which can outshine its entire galaxy.
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