英语词汇“astronomical unit”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

astronomical unit

(abbreviation AU)

noun Astronomy

A unit of measurement equal to 149.6 million kilometres, the mean distance from the centre of the earth to the centre of the sun.Bodies that formed from the Sun out to a distance of about 2.5 astronomical units are primarily rocky and metallic....

Typical distances from the Sun are 10,000 astronomical units, and typical orbital periods are on the order of 1 million years.
Today the distance between the Earth and sun, known as an astronomical unit, is accurately measured by radar.

单词	astronomical unit
释义	astronomical unit (abbreviation AU) noun Astronomy A unit of measurement equal to 149.6 million kilometres, the mean distance from the centre of the earth to the centre of the sun.Bodies that formed from the Sun out to a distance of about 2.5 astronomical units are primarily rocky and metallic.... Typical distances from the Sun are 10,000 astronomical units, and typical orbital periods are on the order of 1 million years. Today the distance between the Earth and sun, known as an astronomical unit, is accurately measured by radar.
随便看	diplomatic service diplomatist diplont diplontic diplopia diplopod Diplopoda diplotene Diplura dipluran dip net dipolar dipole dipole moment dip one's toe into (or in) dip one's wick dip pen dipper dipping sauce dippy dipshit dip slope dipso dipsomania dipsomaniac