Gamma Ray

"Gamma rays have the shortest wavelengths (< 0.01 nanometers ) and the most energy of any region of the electromagnetic spectrum. Gamma rays are produces by the hottest objects in the universe, including neutron stars, pulsars, supernova explosions. Gamma rays can also be created by nuclear explosions. the majority of gamma rays generated in space are blocked by the Earth's atmosphere. This is a good thing as gamma rays are biologically hazardous." (Humboldt State University, 2014)