Mars

The red planet, with the tallest volcano and one of the longest canyons in the Solar System.

Rusty iron dust gives Mars its color. Olympus Mons rises about 22 km, and the Valles Marineris canyons would stretch across the United States. Rivers and lakes once flowed here, and rovers are still looking for signs of past life.

Key facts

Type: Rocky planet
Distance from the Sun: About 228 million km (1.52 AU)
Diameter: 6,779 km
Day: 24 h 37 min
Year: 687 Earth days
Moons: 2

Mercury
The smallest planet and the closest to the Sun, scorched by day and frozen by night.
Venus
Earth's twin in size, and the hottest planet in the Solar System.
Earth
Our home planet, and so far the only world known to have life and liquid water on its surface.
Jupiter
The biggest planet, more than twice as massive as all the others combined.
Saturn
The ringed gas giant, sixth planet from the Sun and light enough to float in a big enough bathtub.
Uranus
An ice giant that rolls around the Sun on its side.
Neptune
The farthest planet from the Sun, with the fastest winds in the Solar System.

All Planets

Mars

Key facts

More in Planets

Mercury

Venus

Earth

Jupiter

Saturn

Uranus

Neptune