They were made of dust, not rock
They believe the planets formed from a disc of gas and dust called a "protoplanetary disc".
The Earth was formed approximately 4.5 billion years ago from a giant cloud of dust and gas in space. As gravity pulled these particles together, they accumulated to form the Earth and other planets in our solar system. This process is known as accretion.
When the sun was being born, matter that was circling around it formed into planets. There was hundreds of planets, but most of them were destroyed when they crashed into each other. Eventually, only the main 8 planets were left. Then water came on earth from comets.(scientists think so anyway) and life was formed
The first four planets from sun Mercury, Venus, Earth and Mars are rocky planets other planets in solar system are gaseous or dusty planets.
Certainly yes, it meteorite impact formed the same as sites on the other planets.
They believe the planets formed from a disc of gas and dust called a "protoplanetary disc".
The other planets, stars, galaxies, meteors, comets, and asteroids.
We believe that our solar system, including the Sun, Earth and all the other planets, formed about 4.5 billion years ago
4.6 billion years ago.
first era was the Precambrian
The Earth was formed approximately 4.5 billion years ago from a giant cloud of dust and gas in space. As gravity pulled these particles together, they accumulated to form the Earth and other planets in our solar system. This process is known as accretion.
When the sun was being born, matter that was circling around it formed into planets. There was hundreds of planets, but most of them were destroyed when they crashed into each other. Eventually, only the main 8 planets were left. Then water came on earth from comets.(scientists think so anyway) and life was formed
The planets of our solar system were formed at different times, the earth is known to have formed as a planet about 4.6 billion years ago but other planets in the solar system may have formed earlier or later as they were quite conceivably not formed in the same manner as the earth
The first four planets from sun Mercury, Venus, Earth and Mars are rocky planets other planets in solar system are gaseous or dusty planets.
Scientists believe that the Earth and other planets in our solar system formed about 4.6 billion years ago from a disk of dust and gas surrounding the young sun. This process, known as accretion, involved the gradual gathering of particles to form the planets.
At the same time that the Earth (and the other planets) formed : 4.5 billion years ago.
All planets other than Earth could be considered alien. Earth is the only planet known to harbor life.