4 ms·

So this is based on mathematical modeling. Here's one reference I found [1] that estimates 5,000 years. I know I've heard 30,000 too, which is really within the

by cletus 5y ago

So this is based on mathematical modeling. Here's one reference I found [1] that estimates 5,000 years. I know I've heard 30,000 too, which is really within the same order of magnitude. [1]: https://sciencing.com/fun-sun-moon-stars-8459789.html https://sciencing.com/fun-sun-moon-stars-8459789.html

jhgb 5y ago
When I was younger (like three decades ago), the number I was taught was something like two million years (if I remember it correctly; I might still be able to find that book if I'm lucky).
- truculent 5y ago
  To add to the confusion, I vaguely recall a number of around 125,000 years. I think it was either from "A Brief History of Time" or Jeff Forshaw's "Why Does E=mc2?".
  - neltnerb 5y ago
    carbon dating is really unreliable on photons.