a unit of length, equal to the mean distance of the earth from the sun: approximately 93 million miles (150 million km).
That was one astronomical unit, equal to about ninety-three million miles, the distance from Earth to the sun.
Rip Foster in Ride the Gray Planet Harold Leland Goodwin
In naming these enormous distances what astronomical unit is used?
The Chautauquan, Vol. III, February 1883 The Chautauquan Literary and Scientific Circle
We are, so to speak, an astronomical unit, and we affect each other for better or for worse.
The Moon Destroyers Monroe K. Ruch
a unit of distance used in astronomy equal to the mean distance between the earth and the sun. 1 astronomical unit is equivalent to 1.495 × 1011 metres or about 9.3 × 107 miles
A unit of length equal to the average distance from Earth to the Sun, approximately 149.6 million km (92.8 million mi). It is used especially to measure distances within the solar system. Compare light-year, parsec.
The mean distance between the Earth and the sun, about 98 million miles or 150 million kilometers. It is often abbreviated as AU.
- Astronomical year
(def 4b). Historical Examples Do all that you can to teach the signs of the zodiac, the days of the seasons, and all the doings of the astronomical year. Winter Dallas Lore Sharp His astronomer, by name Sosigenes, did his best, but assumed the astronomical year to be 11 min. More Science From an Easy […]
of, relating to, or connected with . extremely large; exceedingly great; enormous: It takes an astronomical amount of money to build a car factory. Contemporary Examples The Instagram deal coincided with astronomically high hopes for the Facebook IPO. How Joining Facebook Is Hurting Instagram Alex Klein August 27, 2012 If you had such an astronomically […]
the science that deals with the material universe beyond the earth’s atmosphere. Contemporary Examples “Occult” literally means “hidden from view,” which is why we use it both in astronomy and to refer to secret knowledge. Chariklo, a Minor Planet Nicknamed a “Centaur,” Discovered to Have Rings Matthew R. Francis April 5, 2014 After To Die […]
noun one who loves stars, astronomy Word Origin Greek astro ‘star’