O3 has various meanings in the NASA category. Discover the full forms, definitions, and usage contexts of O3 in NASA.
A molecule made up of three atoms of oxygen. Occurs naturally in the stratosphere and provides a protective layer shielding the Earth from harmful ultraviolet radiation. In the troposphere, it is a chemical oxidant, a greenhouse gas, and a major component of photochemical smog. Form of oxygen produced by discharge of electricity into the air. An almost colorless, gaseous form of oxygen with an odor similar to weak chlorine.
NASALast updated: