الصفحة الرئيسية > Term: Solar Cycle
Solar Cycle
A period of 28 years, within which the first day of the year passes successively through the same sequence of week-days.
- قسم من أقسام الكلام: noun
- المجال / النطاق: اللغة
- الفئة: Encyclopedias
- Organization: Project Gutenberg
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