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  1. Dictionary
    supernova
    /ˈsuːpəˌnəʊvə/

    noun

    • 1. a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

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  2. en.wikipedia.org › wiki › SupernovaSupernova - Wikipedia

    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.

  3. spaceplace.nasa.gov › supernova › enWhat Is a Supernova? - NASA Space Place

    Jul 9, 2024 · A supernova is the biggest explosion that humans have ever seen. Each blast is the extremely bright, super-powerful explosion of a star. An illustration of one of the brightest and most energetic supernova explosions ever recorded. Image credit: NASA/CXC/M.Weiss.

  4. www.britannica.com › science › supernovaSupernova | Definition, Types, & Facts | Britannica

    Jun 15, 2024 · 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. Supernovae resemble novae in several respects.

  5. earthsky.org › astronomy-essentials › definition-what-is-a-supernovaWhat is a supernova? - EarthSky

    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.

  6. www.scienceabc.com › nature › universeSupernova: Definition, Facts And Significance - Science ABC

    Oct 19, 2023 · A supernova is a star that has reached the end of its life and has exploded. The light from a supernova can be seen from billions of light years away and is so bright that it can outshine an entire galaxy. Supernovae are important because they help create new elements and distribute them throughout the universe.

  7. cosmonova.org › what-is-a-supernovaWhat Is a Supernova? - Definition and Astronomical Facts -...

    What is a supernova and how does it look? Discover the key characteristics of supernovae, their origin, lifecycle duration, and what happens after supernovae die.

  8. sentinelmission.org › astronomical-objects-glossary › supernova-2Supernova - Definition & Detailed Explanation - Astronomical...

    Apr 5, 2024 · A supernova is a powerful and catastrophic event that occurs when a star reaches the end of its life cycle. During a supernova, a massive star explodes, releasing an immense amount of energy and creating a bright, luminous explosion that can outshine an entire galaxy for a brief period of time.

  9. sentinelmission.org › astrophysics-glossary › supernovaeSupernovae – Definition & Detailed Explanation – Astrophysics...

    Apr 24, 2024 · A supernova is a powerful and catastrophic event that occurs when a massive star reaches the end of its life cycle. During a supernova, the star explodes, releasing an immense amount of energy and creating a bright, luminous explosion that can outshine an entire galaxy for a brief period of time.

  10. www.space.com › 6638-supernovaWhat is a supernova? | Space

    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...

  11. www.nationalgeographic.com › science › articleSupernovae Information and Facts | National Geographic

    Supernovae. Learn more about what happens when stars explode. 3 min read. Some stars burn out instead of fading. These stars end their evolutions in massive cosmic explosions known as...