By, Jessica Jackway


  • Number 8 from the Sun
  • Neptune was discovered in 1846
  • Diameter of the planet is 49,528 Km
  • The revolution around the Sun takes 164 years, 90 days, and 4 hours
  • The length of the day is 16 hors and 17 minutes
  • Neptune has 13 known moons
  • Average distance for the Sun: A. Perihelion: 29.81 Astronomical Units (AU) B. Aphelion: 30.33 Astronomical Units (AU)
  • Average surface temperatures: A. Day: -200 degrees Celsius B. Night: -218 degrees Celsius
  • Neptunes surface is made up of gas
  • Gases that make up the atmosphere is Hydrogen, Helium, and Methane Gas

Rings and Global Features

  • Neptune has 5 rings: Galle, Le Verrier, Lassell, Arago, and Adams
  • The first ring was discovered in 1968 but wasn't confirmed in 1989
  • The rings are madde up of small rocks and 20%-70% of dust
  • There are no unusual geological features on Neptune because of its gasious form

Missions Future/Past

  • The first idea of exploring to Neptune was in 2005 but was taken away from possible future missions (PFM) in 2008
  • NASA envisions that an unmanned spacecraft could be launched around 2016 8-12 years to reach Neptune and 16-24 years to go there and back

How Neptune got it's name and when the planet was discovered

  • Neptune was discovered in 1846
  • Neptune got it's name from a Romainian God along with a Greek God named Poseidon.

5 Interesting Facts

  1. Neptune is the most distant planet from the Sun
  2. Neptune is the smallest of the Gas Giants
  3. Neptune's surface gravity is almost Earth-like
  4. The discovery of Neptune is still a controversy meaning nobody knows who discovered Neptune first
  5. Neptune has the strongest winds in the Solar System