Skip Nav

Fun and Unusual Space Facts

Out-of-This-World Facts on the Planets

Now that years have passed, and we can remove Pluto from our solar system's family of planets without argument, it's time to focus on the eight planetary masses orbiting the Sun. Impress your friends, pub trivia foes, and Neil deGrasse Tyson by learning these galactic facts on Earth's neighbors.

Follow the break for more facts on the wild planet worlds of space.

  • The deepest spot on Earth is called the Challenger Deep, which is located in the Mariana Trench of North Pacific Ocean and measures to a depth of 35,827 feet.
  • The International Astronomical Union's official definition of a planet is: "A celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces, so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit." Sorry, Pluto.
  • We're not so special. Since 1991, astronomers have found over 450 planets outside of our solar system that orbit stars.
  • Source: NASA

Latest Tech