Mercury (planet)
Mercury is the nearest planet in the Solar System to the Sun. It is very small. It is covered in craters. It is very hot every day, and very cold every night.
It is the smallest planet in the solar system. Because it is the closest planet from the Sun, it is the fastest planet. It only takes 88 days for it to go around the Sun.
It is one of the densest planets in the solar system, second to our Earth. The planet is made up mostly of iron, which is very dense. However, it has the very weak magnetic field.
Mercury has only been visited by one spacecraft, Mariner 10. The planet is named after the mythological Roman winged messenger of the gods, because it orbits the Sun so fast.
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| The Solar System |
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| Star: The Sun |
| Planets: Mercury • Venus • Earth • Mars • Jupiter • Saturn • Uranus • Neptune |
| Dwarf planets: Ceres • Pluto • Eris |
| Small solar system body: Asteroid belt • Comets • Meteors • Kuiper belt • Scattered disc • Oort cloud |
| Other: Moon |