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Mercury is the planet that is closest to the Sun and the one that orbits the fastest (the Mercurian year is only 88 days). It is the second hottest planet after Venus.

Due to its proximity to the earth and allowing its observation with the naked eye, it is one of the 6 known planets of antiquity.

Although it does not emit any apparent light of its own, it reflects sunlight and is one of the brightest planets in the sky. However, it is a complex planet to observe.

Seen from the earth, it is never far from the sun and is mostly overshadowed by the sun. Without the aid of a telescope, we can only see it during sunset or sunrise. For example, it can be seen just before sunrise as a morning star that precedes it.

The surface of Mercury is similar to the surface of the moon.

In addition, the fact that Mercury has an orbit closer to the Sun than Earth allows us to observe an interesting astronomical phenomenon called Solar Transit, which occurs when Mercury seen from Earth passes in front of the Sun.