Mercury


Mercury is the fastest planet in our solar system.
It zips around our Sun at a speed of about 172,000 kilometers per hour (107,000 miles per hour).



Average temperature of mercury at day time is 840 degrees F( 450 degrees C), contrary to this at nights mercury is very cold, average temperature at night time is about -275 degrees F( -170 degrees C).

In Mercury's poles there are places where sunlight never reaches, this means that it is very cold there at all times.

The planet is named for Mercury, the Roman messenger of the gods.

Mercury may be seen as an evening "star" near where the sun has set, or as a morning "star" near where the sun will rise.

Mercury was believed by the Greeks to be two different stars. Mercury's appearance in the morning was called Apollo, and its evening appearance was referred to as Hermes.

Mercury has no atmosphere and no known satellites.

Mercury is a heavily cratered planet, composed of rock with a central iron core that is three-quarters of the diameter of the planet (3,600 km). Following the Earth, Mercury is the second densest planet in the Solar System.

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