What blocks cosmic rays?

Cosmic ray: A ray of radiation of extraterrestrial origin, consisting of one or more charged particles such as protons, alpha particles, and larger atomic nuclei. Cosmic rays entering the atmosphere...

Cosmic rays are a type of radiation we experience that originates in outer space. The catch is that they really aren't "rays" as we know them, but are actually particulate radiation. They're little...

Cosmic rays are not "rays" at all, but high energy charged particles that arrive at our Earth from somewhere "out there" -- their precise origin is presently unknown.Like any high energy charged...

Cosmic rays are electromagnetic energy - like light. They quite naturally travel at the speed of light, which is 299,792,458 meters per second. Note that the cited speed applies to a vaccuum. Their...

Cosmic rays were discovered in 1912 by Victor Hess