Glossary term: 经度
Description: 地球是一个球体，为了定义地球表面上的位置，地球表面被绘上了两组假想线。经线是穿过地球南北两极的大圆线。赤道可以作为纬度0度的自然参考位置，但0度经线的位置需要人为确定。国际公认的0度经线穿过英国伦敦的格林尼治，因此也被称为本初子午线或格林尼治子午线。位于地球另一侧的180度经线称为对跖子午线，基于此设立了国际日期变更线。地球周长共360度。此外，那些与赤道平行的小圆线被称为纬线。
Related Terms:
See this term in other languages
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
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
Let's Map the Earth
astroEDU educational activity (links to astroEDU website) Description: Discover how to read and draw maps by observing.License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons
Tags: Hands-on , Scales , Geography , Maps , GPS , Coordinates Age Ranges: 8-10 , 10-12 Education Level: Primary Areas of Learning: Modelling , Social Research Costs: Low Cost Duration: 1 hour Group Size: Group Skills: Analysing and interpreting data
How To Travel on Earth Without Getting Lost
astroEDU educational activity (links to astroEDU website) Description: Use a globe to describe your position on Earth.License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons
Tags: Geography , Maps , GPS , Celestial navigation Age Ranges: 8-10 , 10-12 , 12-14 Education Level: Middle School , Primary Areas of Learning: Social Research Costs: Low Cost Duration: 1 hour Group Size: Group Skills: Analysing and interpreting data , Developing and using models , Using mathematics and computational thinking
