Glossary term: 天文單位
Description: 天文單位（AU）是一個方便的距離單位，正好等於 149,597,870.7 千米（km）。大約是地球與太陽之間的平均距離，這也是以前對天文單位的定義。AU通常用於測量太陽系和其他行星或恆星系統中的距離。例如，海王星的軌道距離太陽約 30 AU。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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