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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.
Sep 17, 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.
A supernova can light the sky up for weeks, and the massive transfer of matter and energy leaves behind a very different star.
Jun 19, 2023 · According to NASA, supernovas are "the largest explosion that takes place in space." A new supernova called SN 2023ixf has been making headlines since it first burst into view on May 19, 2023...
Sep 20, 2024 · supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level.
- The Editors of Encyclopaedia Britannica
Jun 18, 2024 · Astronomers have discovered the oldest and farthest supernova ever. The new discoveries, based on data from the James Webb Space Telescope, provide a glimpse of the early universe.
Nov 12, 2020 · 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.
