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36,000,000 miles from sun

its year is 88 days long

rotates once every 59 Earth days

its diameter is 3032.4 miles across

atmosphere- virtually nil

temperature: +800 degrees Fahrenheit on sunny side

-346 degrees Fahrenheit on dark side



  Mercury is the closest planet to the sun.  It is now considered the smallest planet in our solar system (See poor Pluto).  Mercury goes very fast around the sun.  It travels at 30 miles per second.  Mercury rotates very slowly so its days are 59 Earth days long.  Mercury has huge mountains and massive craters all over its surface.  The polar regions, which get very little sun, appear to have ice.  Since Mercury has virtually no atmosphere, there are no gasses to trap in the sun's heat.  Thus, the dark side is extremely cold.   Mercury has had temperatures measured at 950 degrees Fahrenheit (hotter than Venus) on the sunny side, but -346 degrees Fahrenheit on the dark side.  Venus is considered having the hottest overall temperature.

  A person weighing 150 pounds on Earth would weigh only 57 pounds on Mercury.  Basically, Mercury's gravity is almost 1/3 what Earth's is.  Better than that, if you could jump 2 feet up on Earth, you could almost jump 6 feet up on Mercury.  Now, that's great basketball stuff.  Mercury, like Venus, has no moons.


Mercury Craters

Mercury Surface

Mercury Surface 2