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.

101 Responses to “ Planet Neptune Facts ”

  1. ahahaha bo


  2. tiffany

    neptune is a cool planet

  3. kairi

    tiffany yeah my best friend and trusted girl
    even you think Neptune is cool
    hey i just hate jennifa she’s so anoying
    she’s a retard

  4. alissa

    neptune was discovered by johann gottfried galle and heinrichlouis d’arrest.

  5. alissa

    neptune was discovered on september 23, 1846.
    neptune’s eight planets are naiad, thalassa, depoina, galatea, larissa, proteus, triton, and nereid.

  6. em

    neptune is a gas planit

  7. Emerald1020

    i love this website!!!

  8. Emerald1020

    this is for my report

  9. ariensy

    i hav 2 do a project of the planet

  10. hickup dude

    I’ve learned that Neptune has only been visited by a spacecraft only once and the name of the spacecraft is voyager 2. AND I’M NOT A NERD I HAVE TO DO A REPORT ON IT

  11. bobby

    it is hot on planet Neptune

  12. Jason

    it is gas like me

  13. nate

    it is made out of gas

  14. yoyo

    Neptune neptune neptune GROW UP!!!!!

  15. deja

    this crap is awesome

  16. seadsadad

    thats kooooooooooooooooooooollllllllllllllllllllllll

  17. theOrochi_power

    earth is better

  18. Bloopey

    awesome planet

  19. the loved one

    “neptune is one of the biggest planets” that is what i got taught today well duh i thought it was smaller than pluto godess i am not in the 5th grade here people nor am i stupid not trying to offend those people who thought i was serouise

  20. sophie

    NEPTUNE ROCKS!!!!!!!!!!!!!!!!!!!!!!1

  21. sophie

    NEPTUNE ROCKS!!!!!!!!!!!!!!!!!!!!!!

  22. kathryn

    i woudent like to go there .its cold .

  23. ur mom

    im awesome and cool at the same time

  24. Ketchup

    Me and snookie are lovers.

  25. me

    i love neptune

  26. Ali

    Neptune is cool. :)

  27. catch ya

    pfff wat about tha planet we live on????? :-/

  28. evelyn

    wow there r actually 14 planets 6 of them are dwarf planets

  29. ShEyAnNe xoxo:)

    #5 is a long fact huh???

    LuV yA!!

  30. philip

    this is retarded it dont tell u the average temperature and thats what is also needed to know

  31. Jeff

    verrrrrrry cccccoooooooooooooooooooool site

  32. danny

    cool ass site

  33. kimmy:)

    this planet is cool< i'm gonna do a project on this!!!!:) love ya kimmy:)!!

  34. bill

    u know what u guys need to be nicer planets have feeling too

  35. Neptune

    Hello…just here to say that i have some facts i want to share with you so this is me telling you about the faint rings that i have and also that there as also been a trace of water on my planet .One more thing did you know that i have a rocky core yes i do .And to everyone who said i was cool Thank you very much =) i injoy all of your coments so please keep writing more=)

  36. Lexus

    Neptune is slow

  37. bdog

    my favorite planet! neptune is awesome! if u say neptune isnt the best. u r mad

  38. bdog

    im doing a project on neptune. im glad i CHOSE it. this really helped :)

  39. urjustsad

    Awww but hickup dude its nerds like you that make this world a better place. Oh and by denying the fact that your a nerd is clearly stating that u r 1

  40. doodle

    i looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooove neptune it is my favorite planet i am doing this for a report.

  41. diez

    we luv neptune and learinng bout it

  42. Bebe

    wowzers great planet hehe bobby is stupid

  43. Bebe

    hehe wow gimini what a great planet

  44. reidabug

    neptune is my zodic sighn thats why i did this planet for my project its really pretty i like the purplish blue color ;p

  45. neptune

    i love neptune and juptier

  46. Grace=)

    wut up neptune is soooo cool

  47. Grace=)

    hello peeps

  48. Grace=)

    anyone here?????????

  49. Grace=)

    i think neptune is a pretty color

  50. Grace=)

    i am making areport for neptune!!!!!!!!!!!

  51. ally

    i like neptune

  52. Key

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

  53. mindless gyrl

    neptune is cool

  54. 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

  55. 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

  56. bob

    #10 is wrong

  57. RhyMeZ417

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

  58. neptune


  59. rick

    neptune rocks!!!!!

  60. maddoll

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

  61. c-dayyy


  62. raam

    neptune has eight moons

  63. @!0R@

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

  64. Kats

    Neptune is sooooooo coool. :)

  65. demitria

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

  66. tita


  67. bunny

    MARS is aWsOmE

  68. bunny

    sadie <3 Brock

  69. mama uglyface

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

  70. dghdfghg

    Neptune is poseidon

    learn ur greek mythology

    Hades is pluto

  71. Bobbypants

    I wove this site

  72. Crystal

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

  73. Liv

    Stop making mean comments this website is really helpful!

  74. Xavier

    there is a typo on number 16

  75. zurah

    im awespme!! hahahahahha lolololol hello bj, brinna (srry spelling?), cameron,marium(srry) and maura :p zurah out ( eace out pepz pepsiiiiiiiiiiiiiiiiiiiiii

  76. spongebob

    we got a bad grade

  77. Silver Lake

    I need this for a school project TT – TT

  78. ju f

    jupiter is stupider than uranus

  79. marcellabd

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

  80. katie

    i like this to have more information

  81. aef1802

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

  82. project

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

  83. marshall

    This is the coolest website ever made!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    I like bananas they are good!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  84. willow

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

  85. kobe


  86. Squiggles

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

  87. 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!!!!!!!!!

  88. rairai

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

  89. rudy

    i love neptune :)

  90. james

    i hate neptune

  91. jayleen

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

  92. stupidmonkeycaca

    They forgot what color are the rings !white ?

  93. bobby

    neptune is cool

  94. 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.

  95. 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.

  96. 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

  97. 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!

  98. 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

  99. pewdiepie

    isen’t neptune a god of water?

  100. 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

  101. Hello

    I cant believe how much info there is