astronomical unit

US /ˌæs.trəˈnɑː.mɪ.kəl ˈjuː.nɪt/
UK /ˌæs.trəˈnɑː.mɪ.kəl ˈjuː.nɪt/
"astronomical unit" picture
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unidad astronómica

a unit of length, roughly the distance from Earth to the Sun, used to express distances within the solar system. It is approximately 150 million kilometers (93 million miles).

:
Mars is about 1.5 astronomical units from the Sun.
Marte está a aproximadamente 1.5 unidades astronómicas del Sol.
The distance between Earth and the Sun is defined as one astronomical unit.
La distancia entre la Tierra y el Sol se define como una unidad astronómica.