Unit nameAbbreviationDescriptionValue Astronomical Unit AU 1 AU = distance from Earth’s orbit to Sun 93 million miles (150 million km) Light year ly 1 light-year = distance traveled in a year at the speed of light 6 trillion miles (9.7 trillion km) Cosmic year, or galactic year The amo...
Institutional affiliations: Authors should use either the full, standard title of their institution or the standard abbreviation of the institutional name so that the institutional name can be independently verified for research integrity purposes. Writing...
The abbreviation of ‘rapid neutron capture nuclear process’, whereby a nucleus rapidly increases its atomic number by repeatedly capturing neutrons. Air shower array An array of detectors measuring the secondary particles or photons produced by a primary cosmic ray hitting Earth’s atmosphere. Superma...