Mars is called the Red Planet., Mars is very similar to Earth., So we call it our ‘sister planet’., Mars is half the size of Earth., Like Earth, Mars rotates on its axis., A day on Mars is 24 hours and 39 minutes long., Mars, like Earth, revolves around the Sun., Mars’ orbit around the Sun takes almost two Earth years., A year on Mars lasts 687 days., Mars has two moons., Two moons are small, and close to the planet., One of the moons revolves round Mars three times every day., Like Earth, Mars has mountains, valleys and volcanoes., It takes 200 days to travel from Earth to Mars., Before people can go to Mars, robots can study the planet and look for living things.

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