Solar System Formation: The Nebular Hypothesis

نظرية النebula هي النظرية الوحيدة المقبولة لتشكيل النظام الشمسي

تoriaالنebula تشير إلى أن النظام الشمسي تشكل من سحابة من الغاز والغبار تسمى النebula الشمسي

الcollapseالجذبي هو المرحلة الثانية لتشكيل النظام الشمسي

تتشكل الكواكب من خلال sürecACCretion

يتشكل الغلاف الجوي من خلال procesoPLANETARY DIFFERENTIATION

الmeteorites تحتوي على جزيئات من النظام الشمسي المبكر

مدار الكواكب جميعها في نفس المستوي

الحزام الكويبر هو منطقة من الأجسام المثلجة توجد قبل نبتون

نظرية النebula تشير إلى أن الكواكب الموجودة الآن بدأت تتشكل منذ مليارات السنين

Solar System Formation

The Nebular Hypothesis

The most widely accepted theory of solar system formation
Proposes that the solar system formed from a giant cloud of gas and dust called the solar nebula
The nebula collapsed under its own gravity, beginning to spin faster and flatten into a disk shape

Stages of Formation

Gravitational Collapse: The solar nebula collapses, with the Sun forming at the center
Planetesimal Formation: Small particles stick together to form larger bodies called planetesimals
Accretion: Planetesimals collide and merge, growing larger and more massive
Planetary Differentiation: Heavy elements sink to the center of the forming planets, while lighter materials rise to the surface
Atmospheric Formation: Gases are released from the forming planets, creating atmospheres

Evidence Supporting the Nebular Hypothesis

Meteorites: Contain particles from the early solar system, with similar composition to the Sun
Comets: Have highly elliptical orbits, suggesting they originated from the outer reaches of the solar system
Kuiper Belt: A region of icy bodies beyond Neptune, thought to be remnants of the solar nebula
Planetary Orbits: The similarity in orbital planes and direction of rotation among the planets suggests a common origin

These notes provide a concise overview of the solar system's formation, focusing on the Nebular Hypothesis and its supporting evidence.

Explore the most widely accepted theory of solar system formation, including the stages of formation and evidence supporting the Nebular Hypothesis. Learn about the solar nebula, planetesimal formation, and planetary differentiation.