The most accepted theory that explains the origin of the universe states that it all started 14 billion years ago. Back then, there was a tiny particle, like an atom, which was very hot and dense. This particle exploded causing the universe to form; matter started to expand and created millions of galaxies. The galaxy we live in is called the Milky Way.

Our planet is approximately 4.5 billion (4,567,000,000) years old. Its origin is still a mystery today, but some theories exist. The "Core Accron Theory" states that at the beginning, our solar system was rotating dust and gases. Then, the primitive sun's gravity attracted these materials and they all started spinning around it. Some clouds formed and became solids. Our planet was formed by a solid metal core, a liquid mantle and a thin but hard crust.

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The most accepted theory that explains the origin of the universe states that it all began 14 billion years ago. Back then, there was a small particle, similar to an atom, that was very hot and dense. This particle exploded, causing the formation of the universe; matter started to expand and created millions of galaxies. The galaxy we live in is called the Milky Way.

Our planet is approximately 4.5 billion (4,567,000,000) years old. Its origin remains a mystery to this day, but there are some theories. The "Acron Core" theory states that initially, our solar system was a collection of rotating dust and gases. Then, the gravity of the primitive sun attracted these materials and they all started to orbit around it. Some clouds formed and turned into solids. Our planet formed from a solid metallic core, a liquid mantle, and a thin but sturdy crust.