نُشر في بواسطة Abdulrahman Sumait

موسوعة الاختراعات ( 342 ) العداد الشمسي

العداد الشمسي

أرسطرخس الساموسي

( بالانجليزية : Aristarchos Samos )

( باليونانية : Ἀρίσταρχος )‏

عالم فلك ورياضيات يوناني

الميلاد : 310 ق.م

الوفاة : 230 ق.م ( 80 سنة )

تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png

يعتبر أرسطرخس مخترع العداد الشمسي النصف الكروي.

وله الفضل في القول بدوران الأرض حول الشمس وتكريس هذه الحقيقة.

إلا أن هذه الحقيقة لم يتقبلها معاصروه رغم ما أدت إلى تفسيره من ظواهر.

تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png

قام أرسطرخس بقياس بعد الشمس والقمر عن الأرض وحجميهما ،

وعرف أن طول السنة الشمسية المعروف ( ثلاثمائة وخمسة وستين يوما ً وربع اليوم ) كان فيه شيء من التقريب

لذلك أضاف له تصحيحاً مقداره 0.0006161 من اليوم أي حوالي ثلاثاً وخمسين ثانية.

تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png

المراجع :

تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png
تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Inventions1E.png
تحتوي هذه الصورة على سمة alt فارغة; اسم الملف هو Screenshot_2020-04-08-thumb2-water-drops-texture-4k-black-background-water-drops-water-backgrounds-jpg-صورة-JPEG،-710×444-....png

جزيرة الأمل || Hope island

107 ردود على “موسوعة الاختراعات ( 342 ) العداد الشمسي”

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