Question: How many different cosmic particles are there?

Adam Berlie answered on 5 Nov 2018:

There are lots of different types of cosmic particles and radiation that we see down here on Earth. Muons are just of these, but you also get pions (which decay into muons) and electrons. You also get protons and small nuclei I believe. Many of these particles come from high energy radiation hitting the Earth’s atmosphere believe it or not.