Mars has no global magnetoshpere today, but areas of the Martian crust in the southern hemisphere are highly magnetized, indicating traces of a magnetic field from 4 billion years ago.
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When the solar system settled into its current layout about 4.5 billion years ago, Mars formed when gravity pulled swirling gas and dust in to become the fourth planet from the Sun.
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Auroras also occur on planets such as Jupiter, Saturn, Uranus, and Neptune. These gas giants have thick atmospheres and strong magnetic fields. These auroras are a little different from Earth's as they are formed under different conditions.
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As mars orbits the Sun, it completes one rotation every 24,6 hours, which is very similar to one day on Earth (23.9 hours). Martian days are called sols—short for "solar day." A year on Mars lasts 669.6 sols, which is the same as 687 Earth days.
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