The solar system is said to have been formed by the gravitational collapse of interstellar molecular clouds about 4.6 billion years ago.

Mercury, Venus, Earth, and Mars orbiting inside are earth-like planets (rocky planets) mainly made up of rocks, Jupiter and Saturn consist mainly of hydrogen and helium. Uranus and Neptune are planets with high melting points than hydrogen and helium.The eight planets are almost on the same plane, and this plane is called the zodiac plane.

Mercury
Venus
Earth
Mars
Jupiter
Satrun
Uranus
Neptune