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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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    More definitions, origin and scrabble points

  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 – NASA Science for Kids

    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. dictionary.cambridge.org › dictionary › englishSUPERNOVA | English meaning - Cambridge Dictionary

    SUPERNOVA definition: 1. a star that has exploded, strongly increasing its brightness for a few months 2. a star that has…. Learn more.

  6. 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...

  7. www.merriam-webster.com › dictionary › supernovaSupernova Definition & Meaning - Merriam-Webster

    The meaning of SUPERNOVA is the explosion of a star in which the star may reach a maximum intrinsic luminosity one billion times that of the sun. Did you know?

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

    Nov 12, 2020 · A supernova is the name given to the cataclysmic explosion of a massive star at the end of its life. It can emit more energy in a few seconds than our sun will radiate in its lifetime...

  9. sentinelmission.org › astronomical-phenomena-glossary › supernovaSupernova - Definition & Detailed Explanation - Astronomical...

    Mar 20, 2024 · 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.

  10. dictionary.cambridge.org › us › dictionarySUPERNOVA | definition in the Cambridge English Dictionary

    SUPERNOVA meaning: 1. a star that has exploded, strongly increasing its brightness for a few months 2. a star that has…. Learn more.

  11. www.dictionary.com › browse › supernovaSUPERNOVA Definition & Meaning | Dictionary.com

    a star that explodes catastrophically owing to either instabilities following the exhaustion of its nuclear fuel or gravitational collapse following the accretion of matter from an orbiting companion star, becoming for a few days up to one hundred million times brighter than the sun.