astronomical unit

US /ˌæs.trəˈnɑː.mɪ.kəl ˈjuː.nɪt/
UK /ˌæs.trəˈnɑː.mɪ.kəl ˈjuː.nɪt/
"astronomical unit" picture
1.

unità astronomica

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 dista circa 1,5 unità astronomiche dal Sole.
The distance between Earth and the Sun is defined as one astronomical unit.
La distanza tra la Terra e il Sole è definita come un'unità astronomica.