Loading...

Glossary term: القطر الزاوي

Description: القطر الزاوي لجسم ما هو قطره المرئي من موقع مُحدَّد مُقاساً كزاوية. يُستخدم القطر الزاوي في علم الفلك كأحد طرق التعبير عن حجم الأجرام السماوية في السماء. يزداد القطر الزاوي مع زيادة الحجم المادي للجسم ويقل عندما يكون الجسم بعيداً. على سبيل المثال، يبلغ القطر الزاوي لكل من القمر والشمس حوالي نصف درجة عند النظر إليهما من الأرض. فالقمر أصغر بحوالي 400 مرة من الشمس لكنه يبدو بالحجم نفسه (حوالي نصف درجة عرضاً)، لأن الشمس تبعد حوالي 400 مرة.

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".

Related Activities


The sky at your fingertips

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 نَسب المُصنَّف 4.0 دولي (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