The Birth of the Solar System
All explosions release a lot of heat. The Big Bang was no exception. The hot soup of the universe collapsed into giant clumps of matter. From this, a massive spinning disk was formed into our galaxy. Within the galaxy, our solar system eventually formed.
Our solar system formed by dust clumping together because of gravity. The gasses at the center fused together and ignited, becoming the sun. The sun is the closest star to us, and gives us the light, heat, and energy that we need to survive! Dust on the outer rings of the solar system came together to create planets. Each planet has its own orbit around the sun. This means that planets are different distances away from the sun.
The Hot Earth
We divide the history of our Earth into eons. The first eon was 4.6 billion years ago when the Earth was first created. This is the Hadean eon, named after the Greek god of the underworld, Hades. In the Hadean eon, the conditions on the Earth were exactly like Hades: very hot and uninhabitable!
Earth formed first as a molten planet. Lava oceans took up most of Earth’s surface. Volcanoes erupted frequently. Cosmic debris and meteorites fell to Earth all the time. There was also no oxygen anywhere. Helium and hydrogen would have made Earth’s first atmosphere extremely deadly. The planet was too hot for any water to exist in its liquid form.
The Cooling Earth
Other Great Resources
Birth of the Earth and The Beginning of Life: https://www.youtube.com/watch?v=MKn0xWM7qh0
Khan Academy on the History of Life on Earth: https://www.khanacademy.org/science/biology/history-of-life-on-earth/history-life-on-earth/v/earth-formation
News Article on Earth’s Formation: https://www.universetoday.com/76509/how-was-the-earth-formed/
Timeline Overview of Earth’s Formation: https://www.bobthealien.co.uk/earth/formation.htm
Detailed Article about the Beginning of Life on Earth: http://www.ecology.com/2011/09/10/earths-beginnings-origins-life/
How did the Earth Form?: https://www.theguardian.com/science/2008/apr/28/starsgalaxiesandplanets.geology