Cool. Most modern theories of heavy element (like gold) formation contribute most of their creation to neutron star (the corpse of a dead star) collisions and mergers.Thanks for sharing. I'm going to start watching out for betelgeuse now. Why did they name it betelgeuse?
Here's one I like. Similar subject but more about the elements created from the supernova's rather then the supernova's themselves. Its a little slow at first but gets good.
https://www.livescience.com/60701-ligo-neutron-stars-heavy-metals-gold.htmlThe finding was an important step in figuring out the origin of heavy, neutron-rich elements in the universe – and the ones we find on Earth. Supernovas were once thought to create such elements, but the process wasn't efficient enough, said Marcelle Soares-Santos, an assistant professor of physics at Brandeis University in Massachusetts. The proportion of heavy elements in Earth seemed too large to be accounted for by the amounts generated by supernovas, she said.
Betelgeuse is about 500 light-years away, not near enough to cause serious damage. We might see a little bit of damage to the ozone layer, or some small increase of radiation on the ground on Earth, but these would be too small to matter.
Based on the latest work with my collaborators, a massive star would need to be within about 150 light-years to cause measurable damage. We think that may have happened about 2.6 million years ago, and possibly contributed to an extinction event at the end of the Pliocene era that took out marine megafauna. (See the November 27, 2018, issue of the journal Astrobiology, and “Could a supernova explain an ancient mass extinction?” on page 11 of Astronomy’s April 2019 issue.) A supernova within about 25 light-years would probably cause a major mass extinction, which has likely happened one or more times in the past 500 million years.
I seen a couple episodes the other day, I thought WOW when I learned how fast our Galaxy was moving, I had no idea. Then they suggested that if collisions with other Galaxy’s are possible we wonder into each other and merge and become a completely new Galaxy far different than what we have now. Not to mention collisions with wondering dwarf planets.
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