Description: 在天文學中，celestial body、celestial object、astronomical body和astronomical object等術語幾乎可以互換使用，它們是天文學家研究的太空中所有物理實體和天體的通用術語，包括恆星、行星、星系、氣體雲等。有些天文學家在狹義上使用天體或天文物體，即指與周圍環境明顯分離的物體——從這個意義上說，行星是天體，而氣體雲則不是（但它仍然是天文物體）。在最小的尺度上，這些術語並不常用。質子可能從外太空到達我們這裡，但通常不會稱它為天文物體或天體。

Related Terms:

• 小行星
• 彗星
• 銀河系
• 行星

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

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".