There are eight planets in the Solar System.
Do you know them? Can you list them all one by one? Let's get started!
The first planet in order from the Sun. Also, the smallest one. Its mass is only 5.5% of the mass of the Earth.
Venus, a "younger sister" of the Earth, is the second planet in order from the Sun. The geological structure of this planet most probably resembles Earth's.
The Earth, our home, is the third planet from the Sun.
Mars - the fourth planet from the Sun - is considered the most similar to the Earth. Day on Mars lasts only 41 minutes longer than on our planet.
Jupiter, the fifth planet from the Sun, is the biggest planet in the Solar System. Jupiter is mainly made of gas, so there is no solid surface.
Saturn, the sixth planet from the Sun, is the second-largest planet in the Solar System - right after Jupiter.
Uranus, the seventh planet from the Sun, was initially taken as a comet. It's the coldest planet in the Solar System.
Neptune is the eighth and last planet from the Sun in the Solar System. Due to the great distance of Neptune from Earth, it is not yet a well-studied planet.
What about the Pluto?
Pluto is no longer a fully-fledged Solar System planet anymore. But it was not long ago.
In 2006, the International Astronomical Union introduced the concept of a dwarf planet and classified Pluto in this category, similarly to planets Ceres, Haumea, Makemake, and Eris.