Mars is the fourth planet remotest from the Sun.

Mars belongs to the planets of the earth group and is named after the ancient Roman God of war, analogous to the ancient Greek Ares.

Mars has two natural moons-Phobos and Deimos (meaning "fear" and "horror"). The names are given to the moons in honor of characters in Greek mythology, the sons of Ares.

Mars has been known to people since ancient times, when people watched the movement of the red star, the harbinger of wars and cataclysms, across the sky.

Mars has a thin atmosphere.

Mars ' neighbors are Earth and Jupiter, which is separated from the red planet by an asteroid belt.

Models suggest that Mars consists of a crust with an average thickness of 50 kilometers (the maximum estimate is no more than 125 kilometers), a silicate mantle, and a core with a radius of 1480 to 1800 kilometers.

The main features of the surface terrain of Mars are considered to be impact craters, volcanoes, valleys, deserts, and polar ice caps. The highest mountain on the planets of the Solar system Olympus is an extinct Martian volcano.