Comments by "Bo McGillacutty" (@Mrbfgray) on "Питер Уорд о массовых вымираниях." video.

Doesn't 4:35 show a supernova?? That's not the fate of our star.
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@Jacob Zondag It balloons up engulfing the inner planets then shrinks down and fades away. It's several times too small to go supernova. There seem to be a lot of careless misleading elements in the presentation, not a great job.
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@Jacob Zondag Supernova's are one of the most violent happenings in the universe, they briefly outshine an entire galaxy of 100's of billions of stars combined, we can see them across the universe. They also create most of the heavy elements where as the sun stops at iron which is too stable to easily fuse and ends the process unless the mass is great enough whence supernovas happen. Those explosions inject huge areas with all the elements we and Earth are made of. The old saying 'we are star dust' is literally true. Some of the heaviest elements are probably not created even in supernovas however, gold, platinum group, etc., are probably only created in neutron stars colliding with eachother...my current understanding anyway. About once per century or so we can expect a supernova in our galaxy, the nearest one ready to detonate, many times the size of the sun(sometimes pronounced 'Beatle juice')is the orange looking star in the Orion constellation and expected to detonate soon, with in a million yr.s or so, it's axis of rotation is fortunately not lined up with us or we could be in trouble with that one, could sterilize Earth, strip the atmosphere, as they emit extreme jets of high energy radiation from the poles. This is the reason that the galactic "habitable zone" is considered not near the center of the galaxy where stars are dense and explosions relatively common. ((pardon if that's TMI))
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@jackpleb2360 Certain conditions are required for a supernova to be possible, the sun is vastly too small, so unless you can come up with a scenario to merge a dozen or two more common size stars into the sun it's NOT POSSIBLE. How can you be commenting on this and not know that??
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@jackpleb2360 Yeah it was even known back in the '50's that the sun cannot go supernova, it's a function of mass, most stars are not big enough but that still leaves perhaps billions in a large galaxy that WILL eventually explode. This physics has been understood to that extent for over half a century. May I suggest a link or two that explains the basics? This guy is very watchable, clear and concise and has quite a few excellent vids on the topic. https://youtu.be/rdgOkSKPP1Y
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