Mercury Facts and Information


Mercury has been known to us since 300BC and is a very small planet close to the sun making it hard to see.  Mercury can only been seen with a telescope before sunset or just after dawn.  It appears as a small spot in front of the surface of the sun. There is no life on Mercury,  extreme temperature changes make this impossible.

Facts about Mercury

  • Mercury is the smallest planet in our solar system
  • It has no atmosphere, ring system or moons
  • It takes 88 days to orbit the sun
  • The temperature on Mercury’s surface is between -170 and 420 degrees Celsius
  • Mercury is the second hottest planet, Venus is the first
  • It has the more craters than any other planet, this is caused by comets and asteroids.
  • Mercury was named after a Roman god, Mercury was the son of Maia Maiestas and Jupiter.
  • Sunrise to sunset, one day on Mercury takes 87 earth days
  • Mercury is 70% iron which is located at its core, making it the second densest planet in our solar system after Earth.
  • Two space craft’s have visited Mercury, Mariner 10 and Messenger.

Mercury Data

  • Diameter (Km) 4879
  • Mass 328.5E21 kg
  • Density (Kg/m³) 5427
  • Temperature (°C) -170 to 420
  • Distance from sun (Km) 58 Million
  • Rotation period 1407.6 hours
  • Length of Day 4222.6 hours
  • Orbital period 88 Days
  • Number of moons 0
  • Magnetic field Yes
  • Ring system No