Mercury is the smallest and hottest planet in the Solar System. Its orbital period around the Sun of 88 days is the shortest of all the planets in the Solar System. It is named after the Roman god Mercury, a.k.a the messenger. 

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has the longest rotation period of any planet in the Solar System. It is named after the Roman goddess of Love & Beauty 

Earth is the third planet from the Sun and the only object in the Universe known to harbor life, which is the reason why there are billions of people living there. 

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System. It is named after the Roman god of War 

Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the other planets in the Solar System combined. It is named after the King of all Roman gods 

Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth. It is named after the Roman god of agriculture 

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. It is named after the Roman god of the sky

Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. It is named after the Roman god of the sea