Mercury is the smallest planet in the Solar System
One of five planets visible with the naked eye  –  just 3,049 miles across its equator, compared with 7,964 miles for the Earth.

  • smallest planet in the solar system.
  • closes to the Sun.
  • distance from the Sun – 35,980,000 miles.
  • 88 days in one year (Earth = 365 days in one year).
  • one Earth year (365 days) is the same as 4 Mercury year.
  • 176 earth day is the same as one mercury day.
  • Mercury is covered in thousands of craters.
  • temperature: minimum -173ºC / maximum +427ºC.
  • Mercury is slightly larger than Earth’s moon.


Only two spacecraft have ever visited Mercury
  • During 1974 and 1975 Mariner 10 (left photo) flew by Mercury three times, during this time they mapped just under half of the planet’s surface.
  • On August 3rd 2004, the Messenger probe (right photo) was launched from Cape Canaveral Air Force Station, this was the first spacecraft to visit since the mid 1970′s.


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