天文单位（地球与太阳间的平均距离，约为9300万英里）

astronomical unit───天文单位（地球与太阳间的平均距离，约为9300万英里）

astronomical years───天文年；回归年

astronomical clocks───[天]天文钟

astronomical clock───[天]天文钟

astronomical year───天文年；回归年

astronomical latitude───[测]天文纬度；[天]黄纬

astrological charts───星象图

astronomical triangles───天文三角形

astronomical───adj.天文的，天文学的；极大的

It could be found up to 30,000 astronomical units from the sun.───它可能会在距离太阳3万个天文单位的地方被发现。

fairly close to its star, at 14.5 astronomical units AU; one AU is the average distance between Earth and our Sun.───十分接近其围绕的恒星，它们之间的距离为14.5个天文单位AU；一个天文单位是指地球到太阳的平均距离。

the Earth, it is one because we work in astronomical units.───地球也是一个，因为我们用天文单位。

This region extends from the orbit of Neptune out to 55 astronomical units (55 times the distance of the Earth to the Sun).───柯伊伯带的范围由海王星轨道外开始，延伸至距太阳55天文单位处（地球和太阳之间的距离的55倍）。

They found the star to be surrounded by a so-called circumstellar disk measuring some 130 astronomical units (12 billion miles) across.───他们发现围绕星体的碟状物质直径大约130天文单位（120亿英里）。

Delta is the distance of the planet from Earth (in Astronomical Units), App.───Delta是行星距离地球的距离（单位：天文单位），App。

The frosty Kuiper belt lies roughly 30 to 55 astronomical units (AU) from the Sun.───寒冷的柯伊伯带位于离太阳30至55个天文单位的距离。

The second asteroid belt lies at about 20 astronomical units from the star, or a position comparable to Uranus in our solar system.───第二个行星带距离它的恒星为20个天文单位，这相当于太阳系中天王星的位置。

The inner belt orbits at a distance of about 3 astronomical units from its star--or about the same position as the asteroid belt in our own solar system.

The asteroids all lie between 2.2 and 3.3 astronomical units from the sun.