Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 8 months ago

What would happen if betelguese exploded like a supernova?

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  • ANDY
    Lv 5
    8 months ago
    Favorite Answer

    Betelgeuse WILL explode as a supernova. Its mass is anywhere from 10 to 20 times that of the sun. What will happen? Actually nothing much because of its distance being 500 to 700 light years away from us─scientists are not quite sure of its distance. When it explodes, if not already has, we would see a bright glow in the sky nighttime and daytime for weeks.

    Astronomers have been noticing a weird "behavior" of this red giant. For years they have noticed it was dimming. And while it was one the 10 brightest stars we see in the sky, it has now become one of the twenty brightest. The reason of the dimming is not clear (a variable star?) since it has been going on for the last few decades.

    Betelgeuse came to be a star less than 10 million years ago; and because of its great mass it is nearing its end. So as I mentioned, it could have already exploded, and the glow will arrive to us in due time anywhere in a few days, or after a few hundred years, or it hasn't yet.

  • 8 months ago

    the greatest skylighter in our lifetimes

    day and night for days or longer

  • 8 months ago

    Say it three times and see what happens

  • Clive
    Lv 7
    8 months ago

    I assume you mean Betelgeuse.  And what do you mean, "like a supernova"?  It WILL BE a supernova eventually.  And when it goes off bang, the blast of cosmic rays may well play havoc with anything electronic, and it will be the brightest star in the sky, probably visible in daylight, until it fades away.  It'll certainly be world news as just about everybody will be able to see it.

    And going by the Crab Nebula, which is what is left of a supernova that was visible in 1054, most likely it will leave a nebula behind with a neutron star in the middle.  Which might be more visible than the Crab as it's closer.

    Talking of distance, Betelgeuse is over 600 light years away, (just as well - we really don't want to be too much closer to the explosion) so it may have already happened, but less than 600 years ago so we don't know about it yet.

    And astronomers will love it.  There hasn't been any chance to see a supernova up close since the telescope was invented (the last reasonably close one was Tycho's Star in 1572) and nobody wants to miss the opportunity to see one with all our modern instruments.  It'll be the science story of the year and probably the decade.

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  • 8 months ago

    It would be brighter than the Moon for a while then fade away, but it should become a great Nebula

    At 645 Light Years distant and because of the Speed of light, it would take the same amount of time for such an event to become Apparent on Earth

     If it hasn't actually went Supernova in the Mean time

     Studies have shown that its Diameter has been very unstable and could blow any time

    At such a Distance, Earth should come to no harm

    But the Supernova would be so bright that initially it could be seen in Daytime

    Attachment image
    Source(s): Betelgueuse
  • 8 months ago

    It's relatively close to us - about 640 light years - so, it would be very bright;  bright enough to be seen during daylight hours.  The Crab Nebula exploded in a similar manner Betelgeuse is expected to - and, it was seen for weeks during daylight, and it remained bright in the sky for a couple of years after that; so, probably Betelgeuse will behave in a similar manner.

  • Elaine
    Lv 7
    8 months ago

    Orion loses a shoulder. 

  • Sky
    Lv 7
    8 months ago

    It would be a very bright spot in our sky, even visible during the daytime depending on what time of the year it is, and it would be a fascinating subject for astronomical observation, but that's about it as far as we're concerned.  It isn't close enough to cause us any harm.

  • Sparky
    Lv 6
    8 months ago

    I don't know and I'm not sure I'd want to be around to find out

  • Mark
    Lv 7
    8 months ago

    Life  would be extinguished within 30 light years.  Nothing would happen to Earth, though, as Betelgeuse is 643 light years away. 

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