Mars

 Mars is the fourth planet from the Sun, it's also called the red sun because of the colour of it surface, it's the second smallest planet in the Solar System, only behind Mercury. It haves two moons, called Deimos and Fobos.

The colour of its surface is because of the iron oxide that gives it a red appeareance. Most of the surface of Mars feature deserts, and its poles have polar ice caps. It have a thin and dry atmosphere.

In the past it was though that the planet had life, and some persons affirm that it had life million of years ago, but for now, it isn't know. Is impossible that Mars may have life, it is sterile, and it receive so much radiation from the sun. 

But it had a big ocean very while ago. In 2018, a lake with salty water was discovered below the ice of the south pole of Mars. This created a discussion about if the humans could live there in a future.

Olympus mons compared to Spain

The Olympus mons is a volcano located here and is the biggest mountain in the Solar system, the volcano has a height of 21.9 km.