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A supernova (pl.: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion.
May 6, 2024 · Learn about the causes, types, brightness, and effects of supernovas, the biggest explosions in the universe. Find out how NASA scientists use telescopes to study these spectacular events and what they reveal about the origin of elements and the expansion of space.
5 days ago · Learn about supernovae, the explosive events that end the lives of massive stars and create many of the heavier elements in the universe. Find out the types, history, and effects of supernovae, and see images and videos of some of the most famous ones.
- The Editors of Encyclopaedia Britannica
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. Supernovas can briefly outshine entire galaxies and radiate more energy than...
May 21, 2024 · The explosion is a nova, which means it doesn’t kill either the white dwarf or the red giant as a supernova would. “Only about 5 percent of the hydrogen layer fuses into heavier elements like ...
Nov 12, 2020 · A supernova is the cataclysmic explosion of a massive star at the end of its life. Learn about the different types of supernovae, their causes, effects and examples, and how they are classified by their spectra.
Supernovae are massive cosmic explosions that produce heavy elements and enrich space. Learn about the different types of supernovae, how they occur, and what they leave behind.
