Which planet has the coldest atmosphere in the solar system?

  • Uranus correct

    Uranus's atmosphere, although similar to Jupiter's and Saturn's in its primary composition of hydrogen and helium, contains more "ices", such as water, ammonia, and methane, along with traces of other hydrocarbons. It is the coldest planetary atmosphere in the Solar System, with a minimum temperature of -371.5° F, and has a complex, layered cloud structure, with water thought to make up the lowest clouds, and methane the uppermost layer of clouds.

  • Mars
  • Saturn
  • Mercury
  • ON A DAY
    LIKE TODAY
    04/28
  • Fact of the day

    Your tongue print is as unique as your finger print.
  • This day in 1788

    Maryland becomes the 7th state to ratify the U.S. constitution
  • FAMOUS BIRTHDAYS

    • James Monroe

      Monroe Hall, Virginia
    • Oskar Schindler

      Zwittau, Austria-Hungary
    • Harper Lee

      Monroeville, Alabama
    • Penélope Cruz

      43 years old | Madrid, Spain