dan1101Aug 15, 2023

Our entire existence may be a sort of stable spacetime bubble that can pop at any moment.

https://lemm.ee/post/4349955

Our entire existence may be a sort of stable spacetime bubble that can pop at any moment. - lemm.ee

Like ants nesting on a river bank, some only live a few days. A colony could live for many ant generations on a riverbank but when a big flood comes their entire world is wiped out.

Show threadternyAug 15, 2023
A white dwarf close to us could go supernova and wipe us without us being able to do anything about it.
Show threadSkyeStarfallAug 15, 2023
A white dwarf is a remnant of a dead star. It cannot go supernova by itself.
Show threadHexagon
It can, if it’s stealing matter from a companion star and it crosses a critical mass threshold (around 1.44 solar masses). Look up “type Ia supernova”
Aug 15, 2023 at 4:37pmWeb
Show threadRanessinAug 15, 2023
Which means it does need outside help (even passive help).