Mercury is the planet that is closest to the sun, and also one of the rocky planets in our solar system. Three quarters of Mercury is made up of iron. 70 percent of its total weight is made up of iron, which makes Mercury a heavy planet.  Mercury has thin crust and mantle which is only about 300~400 miles thick. It is second most dense planet right next to Earth.

History and facts

    Mercury travels around the sun faster than any other planet in the solar system, and that's how it got its name. Mercury originally got its name from Roman mythology and was named so because it was named after a swift messenger of the gods which is Hermes. The planet is often called the morning star, because it shines brightly just before sun rises. Mercury is the planet that is closest to the sun, the distance between these two being only 28,500,000 miles. Mercury takes 88 days to complete orbiting around the sun, which is about 3 months on Earth.  It has the shortest year of any planet in the solar system. Mercury rotates very slowly compared to Earth which makes a day on Mercury much shorter than a day on Earth. A day on the planet is 58 Earth days!
        Mercury is too small and does not have enough gravity to hold onto an atmosphere . For this reason, it does not have any storms, winds, clouds or rain. Temperature of the surface can reach up to 800 degrees Celsius during the day, but it drops to -180 degrees Celsius during night, which makes it impossible for people to live on Mercury. In addition, there is no air on Mercury because of the same reason, the atmosphere.


interesting facts

picture of Einstein

  • Water on Mercury? Recent data shows that water may exist in the bottom of craters at Mercury's poles.
  • The First visit to Mercury was made by the Mariner 10 spacecraft, in 1974.
  • If you were stand on Mercury, Sun would appear two and a half times bigger than what it looks from Earth!
  • The orbit of Mercury helped prove Einstein's theories of relativity.


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