Planet Neptune Facts

1. Neptune is the fourth largest planet in the Solar System.

2. Neptune is a gaseous planet, composed of hydrogen, helium, methane, with traces of ammonia and water.

3. Neptune was discovered by Urbain Le Verrier, John Couch Adams, and Johann Galle on September 23, 1846.

4. The only spacecraft ever to visit Neptune was Voyager 2 in 1989.

5. In Roman mythology, Neptune is the god of the sea.

6. Neptune has strong winds which is more than any other planet in the Solar System. Winds on Neptune can get up to 2,000 km/hour (1,200 miles/hour). “The Scooter” is a cloud that moves around Neptune about every 16 hours.

7. The blue color of the planet is due to the absorption of red light by methane in the atmosphere.

8. The orbital speed of Neptune is 5.4 km/second.

9. The diameter of Neptune is 49,493 km.

10. One Neptune day is equal to 16 hours in Earth time.

11. One Neptune year is equal to 164.83 Earth Years.

12. Neptune’s maximum distance from the Sun – 4.5 billion km (2.8 billion miles).

13. Neptune’s minimum distance from Earth – 4.3 billion km (2.7 billion miles).

14. Neptune has 13 moons, the largest of which is named Triton. The other moons are: Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Nereid, Halimede, Sao, Laomedeia, Neso, and Psamathe.

15. Neptune has five main rings, they are named after the people who had been doing work on the planet; the rings are: Halle, Le Verrier, Lassell, Arago, and Adams.

16. If you weigh 100 lbs, your weight on Neptune would be 113 lbs. (multiply your actual weight by 1.13).

17. Neptune is the farthest planet from the Sun.

18. Neptune was the very first planet to be located using mathematics rather than observation.

19. The planet is never capable of being seen by the naked eye.

20. In 1898 Voyager 2 conducted a flyby of Neptune and confirmed the presence of a magnetic field around the planet. It also found that the field was tilted like Uranus’. Voyager 2 also discovered six new moons that orbit Neptune and that the planet has more than one ring.

21. The planet is so far from Earth that it took Voyager 2 twelve whole years to get to it.

22. Neptune is notorious for being the stormy planet. Sometimes winds can reach up to 1,240 miles per hour.

23. Neptune emits its own heat at a rate of 2.7 times more than the energy that it absorbs from without.

24. The planet is 30 times farther from the Sun that our planet is.

25. Neptune has 19 moons.

  • Tiffani

    I have this project at school and i need info on Neptune. I need the smallest moon that Neptune has i you have the answer can you give it to me

  • http://planets pewdiepie

    isen’t neptune a god of water?

  • cutie pie

    i love Neptune we have to pic a planet i picked Neptune i love Neptune for a nickname i call it Nep i love Nep i love ep i love nep it sounds like that god from sponge bob

  • Cupcake

    I love neptune my fav planet ever im doing a progect and im getting every thing from this website.Thank you so much!also i like $$$ too!

  • pablo

    i like how you guys do this than go on facebook.
    and the guy that said neards, its nerds. what a retard.
    ahahaha…This wesite is ight i guess. xD

  • michaela

    I love Neptune i like how it has a big red spot.
    It has a lot of clouds it is the smallest planet in the solar system.

  • Jem

    I’m doing Neptune for a school project, because it’s my favourite planet, and I really found this website helpful, although I think it should include the surface temperature which is around -200 degrees celcius, and the core which is approximately 7000 degrees celcius.

  • bobby

    neptune is cool

  • stupidmonkeycaca

    They forgot what color are the rings !white ?

  • http://factsaboutneptune jayleen

    i don’t love neptune i like pluto i love u

  • james

    i hate neptune

  • http://www.factsaboutplanets rudy

    i love neptune :)

  • http://kkjhj rairai

    venus rocks im using it for a project!!!!!!!!!

  • quick chick

    this is so freakin awesome my friend & i have the same planet 4 a project 4 a stupid teacher & now we can cheat!!!!!!!! this totally will help both of our grades. i am so acing this test!!!!!!!!!

  • Squiggles

    Omg, I have to do a powerpoint on this, and I found out that Neptune is the 4th largest planet! Coolio. :)

  • kobe


  • ? willow

    stupid children… i could barely understand any of yalls comments.

  • marshall

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  • project

    very good website i have a project ill get an A+ now thanks

  • aef1802

    i love this site it answered all my questions but one!!!!! (how much neptune weighs!)

  • katie

    i like this to have more information

  • marcellabd

    i luv dis website I LUV I LUV IT I LUV IT

  • ju f

    jupiter is stupider than uranus

  • Silver Lake

    I need this for a school project TT – TT

  • spongebob

    we got a bad grade

  • zurah

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  • Xavier

    there is a typo on number 16

  • Liv

    Stop making mean comments this website is really helpful!

  • Crystal

    This was amazing thnx 4 da research cuz im close to finishing my project

  • Bobbypants

    I wove this site

  • dghdfghg

    Neptune is poseidon

    learn ur greek mythology

    Hades is pluto

  • mama uglyface

    I learned that neptunes wind blows 1,240 per hour and thats 3 times as fast as earths hurricans.

  • http://hotmail bunny

    sadie <3 Brock

  • http://hotmail bunny

    MARS is aWsOmE

  • tita


  • demitria

    this is gooooooooooood i love justin bieber and jaden smith.but when i started learning about neptune i started loving it too.

  • Kats

    Neptune is sooooooo coool. :)

  • @!0R@

    NEPTUNE::::: Neptune is an awesome plant cuz it has 13 moons and it is BLUE ;) my favorite color (*as u can tell*)

  • raam

    neptune has eight moons

  • c-dayyy


  • maddoll

    this is so cool and filled with a hole lot of info everything i need for my power point

  • rick

    neptune rocks!!!!!

  • neptune


  • RhyMeZ417

    dis is an awesome website..i shud come hea often..dankiu!!..research paper for skewl…

  • bob

    #10 is wrong

  • http://mirandadaoops miranda

    omg there are good fact. go neptune dance like kast dance of ur life baby tonight dj is falling us in night now now now dont set roof on fire

  • http://mirandadaoops miranda

    omg there are good fact. Go Neptune is great place they called Neptune because it was name of the roman goddess he was king of sea that why is blue. Neptune is 17 times the mass of Earth. It is the fourth-largest planet by diameter and the third-largest by mass. Neptune is coldest plants but not to worry we will give you a seconded bedroom for free! The greatest thing is that Neptune is related of gas giants so it’s big place. You can even ice skate there would be a lot snow! Neptune has five main rings, they are named after the people who had been doing work on the planet; the rings are: Halle, Le Verrier, Lassell, Arago, and Adams

  • mindless gyrl

    neptune is cool

  • Key

    I have to do a project on neptune. This was SO S HELPful.

  • ally

    i like neptune