7 ms·
Please go boom.
by antupis 6y ago
Please go boom.
- maskedinvader 6y agoyes, please , pretty please, imagine having something as bright as the full moon visible even during the day, decorating our evening skies for a few weeks. oh please happen in my lifetime, please !
- 0xfaded 6y agoAlso, please happen during wintertime in the northern hemisphere. Covid means I won't be escaping the gloom this year.
- EarthIsHome 6y agoHow long would it last?
- pchristensen 6y agoMonths.
- Cofor 6y agoWouldn't we be showered by particles/gamma rays though? I mean... its not only visible light reaching us... but I'm not an astrophysicist
- TheOtherHobbes 6y agoThere might be a small increase in background radiation, but B is too far away to do anything dangerous or dramatic.
- Ma8ee 6y agoThat would be a fitting end to the year 2020.
- zentiggr 6y ago700+ light years of inverse square law says we'll get a noticeable ping but nothing remotely harmful.
- dasb 6y agoI recurrently have these types of dreams: 1. The moon is extremely close to earth, so it covers half of the sky. 2. There's another earth-like planet instead of the moon, also really close. I love those dreams, they also come in nightmare variety: 1. Planes start falling, then there's a big explosion in the sky and fireballs fall towards the earth. Does anyone else have these dreams?
- iamdbtoo 6y agoThe description of your dream made me think of the movie Another Earth. https://www.imdb.com/title/tt1549572/ https://www.imdb.com/title/tt1549572/
- coldcode 6y agoIt may already have. The question is is 725 LY far enough away that we don't blow up too?
- dhosek 6y agoBased on this https://en.wikipedia.org/wiki/Near-Earth_supernova https://en.wikipedia.org/wiki/Near-Earth_supernova it seems like we'd probably be safe, although there's not a lot of specific information about Betelgeuse so perhaps not. The global temperature increase mentioned in the first paragraph is pretty significant and added on top of the imminent anthropogenic climate change maybe don't buy green bananas for the next hundred years or so.
- mrkstu 6y agoAccording to this astronomy.com article, it's well outside the danger zone [0]. This [1] article discusses a closer one that may have been responsible for a mass extinction. [0] https://astronomy.com/news/2020/02/when-betelgeuse-goes-supernova-what-will-it-look-like-from-earth https://astronomy.com/news/2020/02/when-betelgeuse-goes-supe... [1] https://www.discovermagazine.com/the-sciences/a-nearby-supernova-may-have-caused-a-mass-extinction-26-million-years-ago https://www.discovermagazine.com/the-sciences/a-nearby-super...
- mehrdadn 6y agoTotal layman here but somehow very much not-comforted by seeing it's 724 light-years away. That we might not go extinct seems like a far cry from it being safe. And I have an incredibly hard time believing Earth will be unharmed at such a seemingly astronomically small distance. Don't emitted particles travel at like thousands of miles per second? Edit: Wikipedia says < 1000 LY would have noticeable effects on life on Earth: https://en.wikipedia.org/wiki/Near-Earth_supernova https://en.wikipedia.org/wiki/Near-Earth_supernova
- jaywalk 6y agoYou should be comforted by the fact that there's not a damn thing we can do about it either way, so there's no point in worry about it.
- mhaberl 6y agoAccording to this [1] article: > At the distance of Betelgeuse, by 960 years this shell would be 14 times the diameter of the full moon! At about 95,000 years after detonation, this slow-moving plasma will finally reach the solar system. From then-on, we will be inside the volume of intense x-rays and high-energy particles. at least from what I can understand (I'm not an astrophysicist), we would have 96k years to leave the solar system or adapt ourselfs to living in a plasma cloud. [1] https://www.huffpost.com/entry/the-betelgeuse-supernova_b_6583546 https://www.huffpost.com/entry/the-betelgeuse-supernova_b_65...
- _ph_ 6y agoAs the article says, the effect wouldn't affect earth much if at all. At worst, space travel would have to cope with the increased radiation levels.
- mhaberl 6y ago>From then-on, we will be inside the volume of intense x-rays and high-energy particles. It goes on saying that the high-energy particles would not be a big deal. I guess x-rays are a different story. So saying that "the effect wouldn't affect earth much if at all" probably not correct. But then again, in a 100k years we probably won't care one way or the other. We will either be super advanced by then or won't exist.
- crispyporkbites 6y agoIf that were the case, what a fascinating problem for the human race. Imagine knowing we have 95k years to escape the solar system, what would we do? What would it mean for humanity in the next 1000, 5000 and 10000 years?
- flukus 6y ago> what would we do? Some combination of procrastination and denying the problem exists.