light-year
nounmasculinetécnico/ˈɐnuʃ ˈluʃ/medium
a·nos-·luz
Definition
Unit of measurement of distance used in astronomy, equivalent to the distance light travels in one year, in vacuum (approximately 9.46 trillion kilometres).
The nearest star to the Sun is about 4.2 light-years away.
The observed galaxy is located millions of light-years from Earth.
Common collocations
distance in light-yearsmillions of light-yearsmeasure in light-yearslight-years away
Etymology
Composto de 'ano' + 'luz'. Termo científico.