astronomical unit


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Related to astronomical unit: parsec

astronomical unit

n. Abbr. AU
A unit of length used in measuring astronomical distances within the solar system or other planetary system equal to the mean distance from Earth to the sun, approximately 150 million kilometers (93 million miles).

astronomical unit

n
(Units) 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

astronom′ical u′nit


n.
a unit of length, equal to the mean distance of the earth from the sun: approximately 93 million miles (150 million km). Abbr.: AU
[1900–05]

as·tro·nom·i·cal unit

(ăs′trə-nŏm′ĭ-kəl)
A unit of length equal to the average distance from Earth to the sun, approximately 93 million miles (150 million kilometers). It is used to measure distances within the solar system.

astronomical unit


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1. (au) The mean Sun to Earth distance, equal to 92,955,807 mi (149,597,870 km). Agreed internationally in 1964, but its value has altered.
2. (au) A unit of measure based on the distance between the Earth and the Sun. Approximately equal to 1.5 x 108 km.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.astronomical unit - a unit of length used for distances within the solar systemAstronomical Unit - a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers)
astronomy unit - a linear unit used for astronomical distances
Translations
Astronomische Einheit
References in periodicals archive ?
The latest discovery is of a third star in the system, which orbits the primary star from a distance of 28 astronomical units -- close enough to have influenced the hot Jupiter's development and final orbit.
mag] is the measured magnitude for filter X, X(1, [alpha])' is the normalized magnitude at a solar phase angle [alpha] and B = 7[degrees], r and d are the Saturn-Earth and Saturn-Sun distances in astronomical units, k is the fraction of Saturn + rings that is illuminated by the Sun as seen from the Earth and k is computed from k = (1 + cos [alpha])/2.
Secular increase of astronomical unit from analysis of the major planet motions, and its interpretation.
They took measurements at seven points which allowed them to approximate the distance of an astronomical unit Although 12 pupils were directly involved in the collecting of the data, the whole school took turns to use the telescopes.
com/plutos-tiniest-moons-get-named-styx-kerberos-join-charon-nix-hydra-1332011) officially named Styx and Kerberos by the International Astronomical Unit .
icandelo lenzululwazi ngeenkwenkwezi: astronomical unit
06 astronomical unit - and, according to astronomers, too cool to be the source of light Kepler observed.
Thanks to general relativity, a scientist on Jupiter calculating an astronomical unit would get a result differing by about 1,000 meters from an Earth-bound scientist.
In places, the ring itself is 70 times wider than the 150 million kilometer Earth-sun distance, a length astronomers refer to as an astronomical unit.
One astronomical unit, or AU, is the distance from Earth to the sun.
Earth is one astronomical unit, AU, from the sun, which is equivalent to 92.
45 times the Earth's current orbiting distance from the sun, known as an astronomical unit, and 17 times Earth's orbiting distance.