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Structure and Surface
Structure and Surface
Mars is a terrestrial planet. It is small and rocky.
Mars has a thin atmosphere.
Mars has an active atmosphere, but the surface of the planet is not active. Its volcanoes are dead.
Time on Mars
Time on Mars
One day on Mars lasts 24.6 hours. It is just a little longer than a day on Earth.
One year on Mars is 687 Earth days. It is almost twice as long as one year on Earth.
Mars’ Neighbors
Mars’ Neighbors
Mars has two moons. Their names are Phobos and Deimos.
Mars is the fourth planet from the Sun. That means Earth and Jupiter are Mars’ neighboring planets.
Quick History
Quick History
Mars has been known since ancient times because it can be seen without advanced telescopes.
Several missions have visited Mars. And Mars is the only planet we have sent rovers to. They drive around Mars, taking pictures and measurements.
NASA's Hubble Space Telescope took this picture of Mars as it was making its closest approach to Earth in 60,000 years!
In this picture of Mars, you can see water-ice clouds, polar ice, and some rocky features.
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