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4600 BCE
Planetary Accretion
Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. According to several theories1–3, the Earth was formed by accretion from a mixture of silicate particles and metal particles, something like those in chondritic meteorites. -
4500 BCE
Core Formation
It is believed that core formation occurred when the Solar System was very young – less than 30 million years old. The Earth formed from a cloud of dust and gas, and material began to come together to form kilometer-sized planets known as “planetesimals”. These planetesimals rapidly joined together to form larger planets, thousands of kilometers in diameter. Researchers think that the Earth had already formed a core at this early stage. There are many core layer of the earth core. -
4426 BCE
Formation of the Moon
(about 4.5 billion years ago) The moon formed by the debris of the impact between Earth and a Mars-size rock called Theia then covered by a layer of meteorites. -
4000 BCE
Planetary Cooling
About 4.1 billion years ago, time phase where the Earth cooled from the hot lava to create the earth's crust. -
3800 BCE
End of Heavy Bombardment
About 4 to 3.8 billion years ago this was an era where there was a huge commotion of asteroids and comets crashed onto Earth, the moon, and all the inner planets. This marked the moon with light and dark spots on its surface. ( Don't mind the date below)
