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Cosmic Rays

High-energy particles that fly through the universe at close to the speed of light. Cosmic rays are mostly bare protons and electrons. Some probably are blasted into space from exploding stars, while others may come from the disks of material that encircle the supermassive black holes in the centers of galaxies.

Radio Programs

Death and Life Dying stars and life on Earth April 7, 2022

Cosmic Warning System Digging up a cosmic warning system November 12, 2021

Explosive Change The possible influence of exploding stars April 9, 2021

Big Balloons Big balloons for the Antarctic December 1, 2019

Lightning Lightning’s “cosmic” connection June 29, 2019

Circling Antarctica  A busy summer in Antarctica December 4, 2018

Cosmic Hazards If it’s not one thing, it’s another May 31, 2018

Tiger Hunting A tiger chases around the south pole December 4, 2017

Arthur Compton From cosmic rays to gamma rays September 10, 2017

Quiet Sun Cosmic bombardment in tree rings April 5, 2017

Featured Images

Lighting seen from the International Space Station

Colorful Lightning June 29, 2019
IceCube detects a neutrino from a blazar

Cold Fire August 9, 2018
A balloon is prepared for launch from Antarctica

Super Tiger December 4, 2017
Cosmic ray shower

Cosmic Showers November 28, 2016