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

    5 days ago · 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.

  3. 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.

  4. 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.

  5. 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?

  6. 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...

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

    3 min read. Some stars burn out instead of fading. These stars end their evolutions in massive cosmic explosions known as supernovae. When supernovae explode, they jettison matter into space at...

  8. 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...

  9. 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.

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

    The supernova phenomenon is characterized by an increase in the brightness of the star by 4-8 orders of magnitude and its slow decay, as well as a large release of energy as a star explodes. However, since their registration is carried out on the ground, it means that everything is over.