How the earth was formed ?

    


                                 Earth 🌍         


  Hi friends does anyone know how the earth was formed?No nobody knows how the earth was formed but some evidence suggests that   When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle, and a solid crust. At its beginning, Earth was unrecognizable from its modern form. At first, it was extremely hot, to the point that the planet likely consisted almost entirely of molten magma. Over the course of a few hundred million years, the planet began to cool and oceans of liquid water formed. WHEN Earth formed 4.5 billion years ago, it was a sterile ball of rock, slammed by meteorites and carpeted with erupting volcanoes. Within a billion years, it had become inhabited by microorganisms. Today, life covers every centimetre of the planet, from the highest mountains to the deepest   sea   .      Our world, along with the other rocky planets of Mercury, Venus and Mars, formed in the inner solar system, near the Sun, condensing out of swirling clouds of dust and gas through a process known as accretion. In this region of space it is too hot for ice or water to be stable, evidence of which can be observed in the tail and coma of comets, which appear when these “dirty snowballs” make their way into the inner solar system and begin to heat up dramatically.

If Earth was born a hot and dry planet, the water must have arrived later, after the planet had cooled, presumably brought by icy comets and asteroids from far out in the solar system, which bombarded the young planet, seeding it with their water, some of which stayed on the surface and became our oceans, while the rest made its way down into the mantle.             



                                    





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