Formation of Planets
The development of planets is believed to occur in several stages:
(i) Initially, stars form as localized lumps of gas within a nebula. Gravitational forces within these lumps lead to the formation of a core and a rotating disc of gas and dust surrounding it.
(ii) As the gas cloud condenses, matter around the core coalesces into small-rounded objects known as planetesimals. These planetesimals gradually grow larger through collisions and gravitational attraction, eventually forming larger bodies.
(iii) In the final stage, numerous planetesimals merge to form fewer, larger bodies, ultimately resulting in the formation of planets.
Origin of the Earth: Modern Theories Class 11 Notes
The formation of the Earth is a long-standing mystery that has captivated scientists for centuries. Modern theories propose that our planet was born from a vast cloud of gas and dust, known as the solar nebula, which also gave rise to the Sun and other planets in our solar system. These theories provide insights into the processes that shaped the Earth’s early history and continue to influence our understanding of planetary formation.
Let us discuss the origin of Earth from modern theories’ perspective:
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