When was the Earth formed?

Earth was formed approximately 4.54 billion years ago from a cloud of gas and dust known as the solar nebula. This process began when gravity pulled particles together, leading to the formation of the Sun and surrounding planetary bodies, including Earth.

In its early stage, Earth was extremely hot due to constant collisions, radioactive decay, and gravitational compression. Over time, the planet gradually cooled, allowing the formation of a solid crust, oceans, and eventually conditions suitable for life.

Scientists determine Earth’s age using radiometric dating, especially by studying ancient rocks and meteorites. This method provides highly accurate estimates and confirms that Earth is one of the oldest objects in the solar system.

Key insight: Understanding Earth’s formation helps explain the origin of continents, atmosphere, and life itself, making it a fundamental concept in geology and planetary science.