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词条 天文单位

描述: 天文单位(AU)是一个方便的距离单位,正好等于 149,597,870.7 千米(km)。大约是地球与太阳之间的平均距离,这也是以前对天文单位的定义。AU通常用于测量太阳系和其他行星或恒星系统中的距离。例如,海王星的轨道距离太阳约 30 AU。

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词条和定义状态: 该术语的英文原始定义已通过天文研究人员和教师的审核
该术语及其定义的译文仍待审核

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

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Concentric circles for the orbits of Mercury, Venus, Earth and Mars. The Earth to Sun distance is marked as IAU

Astronomical Unit

图注: An astronomical unit (AU) is a convenient unit of distance equal to exactly 149,597,870.7 kilometers (km). This is approximately the average distance between the Earth and the Sun, which was a previous definition of the AU. The AU is often used to measure distances in the Solar System and in other planetary or stellar systems.
来源: Danielle Futselaar/IAU OAE

License: CC-BY-4.0 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标