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Glossary term: نصف‌النهار

Also known as نیمروزان

Description: خطوط طول جغرافیایی را نصف‌النهار هم می‌نامند. نصف‌النهار مبدأ به عنوان خط صفر درجه طول جغرافیایی تعریف می‌شود. این خط از گرینویچ در لندن، انگلستان عبور می‌کند و نصف‌النهار گرینویچ نیز نامیده می‌شود. نصف‌النهار ۱۸۰ درجه (آنتی‌مریدین) در نیمه دیگر کره زمین در طول جغرافیایی ۱۸۰ درجه قرار دارد و مبنای خط بین‌المللی زمان (خط روزگَردان) است.

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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

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".

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License: CC-BY-4.0 Creative Commons تخصیص 4.0 بین‌المللی (CC BY 4.0) icons

Tags: Clocks , Geography , Coordinates , Celestial navigation , James Cook , Exploration
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