You Might Be Looking at a Dead Star #shorts

追加: 2026-05-21

[00:00:00]Look up tonight, one of those stars might already be dead. There's a red supergiant called Betelgeuse, and it's unstable. In 2019, it suddenly dimmed so dramatically that astronomers thought it might be about to explode as a supernova. When it finally does, it could shine as bright as the full moon, even visible in daytime. It's about 640 light-years away, so we're safe. But here's the part that messes with your head. If Betelgeuse exploded 600 years ago, the light just hasn't reached us yet.