Glossary term: 角直徑
Description: 天體的角直徑是指從一個特定位置以角度測量的可見直徑。在天文學中，角直徑是表示天空中天體大小的一種方法。角直徑隨著天體物理尺寸的增大而增大，當天體距離較遠時，角直徑會減小。例如，從地球上看月球和太陽，它們的角直徑都是半度左右。月球比太陽小約 400 倍，但看起來大小相同（大約半度），因為太陽離地球的距離是月球的約 400 倍。
See this term in other languagesTerm 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".
If you notice a factual or translation error in this glossary term or definition then please get in touch.
Related Activities
The sky at your fingertips
astroEDU educational activity (links to astroEDU website) Description: Build a simple cross-staff and measure the stars!License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons
Age Ranges: 10-12 , 12-14 Education Level: Middle School , Primary Areas of Learning: Informal/Field Trip Related , Observation based , Project-based learning Costs: Low Cost Duration: 2 hours Skills: Analysing and interpreting data , Developing and using models
