The Solar System, Formation of Earth

The Solar System consists of the Sun and its main eight planets. Most of these planets have their natural satellites, which are called their Moons. Apart from the Sun, the planets and their moons, the Solar System also consists of billions of other bodies like asteroids, comets, meteoroids, and space dust.

It is believed that more than 4 billion years ago a giant cloud of dust, gases and other particles collapsed. These particles and gases reunited in clusters under the gravitational pull of each other and formed planets. Now they revolve around the Sun in their orbits. They are all bound around the Sun because of its (Sun's) gravity.

Mercury is the closest and the smallest plant around the Sun. Venus is the hottest planet in the Solar System. Earth is the only planet known to consist of living beings. Like Earth, Mars also has volcanoes and has red colored soil, which is basically the rust in its iron rich soil. Jupiter is the largest planet in the Solar System and is mostly made up of gases. Saturn is popularly known to have a ring around it. This ring is mainly made of dust particles. Uranus is the lightest planet of the outer core and radiates the least heat into space. Neptune is 17 times more massive than Earth and radiates more heat into space. Originally classified as a planet, Pluto is not considered as the second largest dwarf planet in the Solar System, and a part of Kulper belt.

Eris

It is the largest known dwarf planet in the Solar System till now. It is approximately 27% more massive than Pluto.

Formation of Earth

There were huge amount of dust and gases around the Sun. They clumped together to form planetesimals, and slowly they became larger and cooled down to form planets. One of them was the Earth.