Phil Plait20h ago

In 1991, a subatomic particle traveling *just* under the speed of light — and I do mean "just" — slammed into Earth's atmosphere with the energy of a major league basebal pitch!

But... where did it come from? And how?

A thing I wrote:

https://www.scientificamerican.com/article/where-did-the-oh-my-god-particle-come-from/

Where did the ‘Oh-My-God’ particle come from?

A single subatomic particle from deep space had the same energy as a baseball pitch, and scientists still don’t know how it got here

Scientific American
Show threadspanghero
@badastro Thank you for sharing. Not sure I fully grasp the numbers involved!
Apr 3 at 3:05pmWeb