क्या ये Meteorite Earth से टकरायेगा ? पृथ्वी के जन्म की कहानी | | Earth History

The Earth originated through a complex process known as accretion, which occurred around 4.6 billion years ago as part of the formation of the solar system. Here's a simplified overview of the process:
Solar Nebula Formation: The origin of the Earth can be traced back to a vast cloud of gas and dust called the solar nebula. This nebula was composed mostly of hydrogen, helium, and small amounts of other elements.
Collapse and Disk Formation: A nearby supernova explosion or a passing star's gravitational pull likely triggered the collapse of the solar nebula. As it collapsed, it began to spin, forming a flat and rotating disk.
Planetesimal Formation: Within the spinning disk, small particles called planetesimals started to form through a process called coagulation. These planetesimals were made up of dust, ice, and rocky material.
Protoplanet Formation: Over time, planetesimals collided and merged due to their mutual gravitational attraction. This process, known as accretion, led to the formation of protoplanets-larger bodies with substantial mass.
Planetary Embryo Growth: Some protoplanets grew larger by continuously colliding and absorbing nearby planetesimals and smaller protoplanets. The gravitational forces of these growing bodies became stronger, attracting even more material.
Differentiation and Core Formation: As protoplanets grew in size, they heated up due to the energy generated by the impacts. This heat caused differentiation, where denser materials like metals sank to the center to form the Earth's core, while lighter materials accumulated on the surface.
Molten State and Earth's Moon Formation: The young Earth was initially in a molten state due to the intense heat generated during accretion. Around 4.5 billion years ago, a collision between a Mars-sized object often referred to as "Theia" and the young Earth occurred. This impact ejected material into space, which eventually coalesced to form the Moon.
Cooling and Solidification: As the Earth continued to accrete material and cool down, its surface solidified to form a thin, rocky crust.
Volcanic Activity and Atmosphere Formation: Intense volcanic activity released gases from the Earth's interior, leading to the formation of the early atmosphere. This atmosphere was primarily composed of carbon dioxide, water vapor, and nitrogen.
Water and Oceans: As the Earth's surface cooled further, water vapor in the atmosphere condensed and fell as rain, filling the low-lying areas to form oceans.
The process of Earth's formation was a dynamic and gradual one, shaped by numerous collisions, gravitational interactions, and the physical properties of the materials involved. This narrative is based on current scientific understanding and is subject to refinement as new discoveries are made.
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