Cosmic radiation

Cosic radiation (pronunciation: /ˈkɒz.mɪk reɪˈdeɪ.ʃən/) is a term used to describe the high-energy particles that originate from space and strike the Earth's atmosphere.

Etymology

The term "cosmic radiation" is derived from the Greek word "kosmos" meaning "universe" and the Latin word "radiatio" meaning "shining". It was first used in the early 20th century to describe the radiation detected from outer space.

Definition

Cosmic radiation is primarily composed of high-energy protons and atomic nuclei. They are produced by various sources, including the sun, other stars, and galaxies. When these particles reach the Earth's atmosphere, they can produce showers of secondary particles that can penetrate and ionize the atmosphere.

Related Terms

Proton: A subatomic particle with a positive electric charge, which is a primary component of cosmic radiation.
Atomic Nuclei: The dense central core of an atom, composed of protons and neutrons.
Ionization: The process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons.
Atmosphere: The layer of gases surrounding a planet or other astronomical body.
Radiation: The emission of energy as electromagnetic waves or as moving subatomic particles.

Effects

Cosmic radiation can have various effects on the Earth and its inhabitants. It can cause changes in the Earth's atmosphere and climate. It can also have biological effects, such as causing damage to living cells, which can lead to mutations and cancer.

Protection

The Earth's magnetic field and atmosphere provide some protection against cosmic radiation. However, astronauts in space are exposed to much higher levels of cosmic radiation, which can pose significant health risks.

External links

Medical encyclopedia article on Cosmic radiation
Wikipedia's article - Cosmic radiation

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Cosmic radiation