10 Interesting Mercury Facts

Wednesday, October 23rd 2013. | Universe

Mercury facts tell you that mercury is the smallest planet in the solar system. This planet is the closest one to the sun. It is very hot because of the position.  The crater surface for this planet has similar characteristics with the surface of earth’s moon.

Mercury Facts 1: Daytime Temperature

The daytime temperature of mercury is around 400 degree Celsius. When the night comes, the hot temperature drops suddenly because the planet does not have any atmosphere to hold the heat. It decreased to -180 degree Celsius.

Mercury Facts 2: No Atmosphere

Mercury has no atmosphere.  It means that there is no weather or wind.  It also has the low surface gravity.

Mercury  Planet

Mercury Planet

Mercury Facts 3: No Water

Many experts state that there is no water on the mercury’s surface. However, some experts believe that mercury probably has water inside.

Mercury Facts 4: Mercury’s Existence

The existence of mercury has been realized by people on earth since the third century BC. The ancient Greek people called it as Hermes when it appeared as an evening star. They called it Apollo when it appeared as a morning star.

Mercury Facts

Mercury Facts

Mercury Facts 5: Surface of Mercury

The surface of Mercury is a bit similar with the moon. You can see smooth terrains, craters and cliff. There are many scars on its surface because of the collision with meteors.

Mercury Facts 6: Mercury’s Interior

A large iron core is located inside Mercury. It has the radius around 1,800 to 1,900 kilometers. The outer shell of Mercury’s surface is 600 km thick.

Mercury Features

Mercury Features

Mercury Facts 7: Extreme Planet

Many scientists agree that mercury is a planet of extreme. The temperature can come up and come down easily. Actually it is hotter if you compare it with Venus. The orbit of this planet is also unique. At the aphelion, it is 70 million from the sun, but in the perihelion it is 46 million km.

Mercury Facts 8: No Satellite

Mercury has no moon even though the surface of this planet resembles the look of an earth’s moon.

Mercury Surface

Mercury Surface

Mercury Facts 9: Rotation

Mercury can complete two orbits after completing 3 rotations.   Mercury days are 176 earth days.

Mercury Facts 10: Caloris Basin

Caloris Basin has a diameter around 1,300 kilometers. It was created because of the crash with an asteroid.  This planet also has a geologic activity which made the planet shrank from the radius 2 km to 4 km.



Mercury is considered as one of the inner planets in the solar system.   It is least concerned by the experts because there is only one spacecraft visited mercury in 1974 to 1985. Mariner 10 discovered that the magnetic field of mercury was weak. How do you like the facts about Mercury?

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