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"Stop staring at that Hubble image"!

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"Pay no attention"!

beetlejuice294.jpg

 

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Clickbaits. I could kill them...

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Apparently, Brown Dwarfs are "too small to be called a planet and too big to be called a star" (1:55). Maybe that's what happens in an antimatter universe.

Dugald Walker

  • Moderator

Whatever is going on with Betelgeuse actually happened 643 years ago! We are just now "seeing" what happened back then.

Fr. Bill    

AOPA Member: 07141481 AARP Member: 3209010556


     Avsim Board of Directors | Avsim Forums Moderator
46 minutes ago, n4gix said:

Whatever is going on with Betelgeuse actually happened 643 years ago! We are just now "seeing" what happened back then.

Betelgeuse is the nearest Red Giant. When it does go supernova, we are too far away for it to harm life on Earth. Astrophysicists say we’d have to be within 50 light-years of a supernova for it to harm us. Instead, when it happens we will see it as a very bright star.

I think Blue Giants can go supernova, too, but I don't know much about them.

Dugald Walker

Technically, Betelgeuse is the closest red supergiant star to the Sun. The closest standard red giant (a star more like the Sun that is approaching the end of its life) is Gacrux (Gamma Crucis), which is 88 light years away.

With respect to supernovae, any star that is more massive than the Chandrasekhar limit (roughly 1.4 times as massive as the Sun) is capable of a supernova outburst at the end of its life, as that is the limit at which a star would collapse into a neutron star rather than a white dwarf (the latter is our Sun's fate).

Edited by Christopher Low

Christopher Low

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