Considering the Big Bang Theory, how was the earth formed?

Question

Elena Antonova · Accepted Answer

In about 13.8 billion years (BY) since Big Bang event, stars, star clusters and galaxies were formed at different periods, Sun is about 4.6 BY old. Earth was formed a little later, 4-4.6 BY ago.

BB explosion generated atoms/particles/elements/, for matter that later became constituents of space bodies, in the order, stars, star clusters and galaxies. A star system evolved in the gravitational sphere of every star. Earth is the Sun system. Sun is believed to have been born about 4.6 billion years (BY) ago. Earth was formed from the planetesimals in a spherical shell around Sun, about 4 - 4.6 BY ago.

Hazel Asher · Answer

undefined The accretion of dust, gas, and other solid particles in the protoplanetary disk surrounding the young Sun is responsible for the formation of the Earth about 4.5 billion years ago. This process took place in the context of the formation of the solar system as a whole, which was started by the gravitational collapse of a giant molecular cloud. Small particles collided and stuck together over time to form larger bodies known as planetesimals, which eventually coalesced into protoplanets. The Earth then took shape through additional accretion and gravitational attraction.