Why doesn't the Sun explode?

  • I know stars explode because of the fuel causing a fusion compound pushing it apart and the fuel runs out and it 'bounces' for lack of a better term.

    Given the fact that more massive stars are supposed to explode more quickly: why doesn't the Sun explode considering its massive size?

    The sun isn't very massive as far as stars go. Astronomers consider a star to be "massive" when it has a mass of at least 5 times our own Sun, but many of the more massive stars can easily reach up to 100 solar masses or more.

    Even the most massive stars we know burns for millions of years so it wouldn't explode on a human timescale.

    it is exploding even right now so what's the matter?

    @user6760 "exploding" .. You keep using that word. I do not think it means what you think it means.

    A star is just a sustained nuclear explosion.

    @A.C.A.C. It really isn't a sustained nuclear explosion. The energy release in the Sun's core is 250 W per cubic metre.

    @Sans Fusion inside the sun does not end in a bang.

  • Rory Alsop

    Rory Alsop Correct answer

    5 years ago

    Our sun is a particularly average sized star on the main sequence. It is not going to ever go "supernova" but instead will slowly swell and darken towards red, eventually swallowing Mercury and Venus.

    enter image description here

    (from http://www.oswego.edu/)

    Very boring in the grand scheme of things. Which is good for us :-)

    ack! yours is better than mine.

    Can you say approximately when mercury and Venus will be swallowed?

    About 10 billion years from next Tuesday. Approximately.

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Content dated before 7/24/2021 11:53 AM