what is cosmic radiation
Radiation from space is constantly hitting the Earth. Radiation from space is called cosmic radiation. About five percent of the average annual radiation exposure for people in the United States comes from outer space. Earth’s atmosphere also shields us from most of the cosmic radiation that comes our way.
The Cosmic Microwave Background. Cosmology is the study of the beginning and evolution of the universe. The big bang. It is now generally agreed among both astronomers and physicists alike that the Universe was created some 10 to 20 billion years ago in a leviathan explosion dubbed the Big Bang.