Planet Pluto Facts

1. As of 2006, Pluto is not longer considered a planet, but rather designated as a “dwarf planet,” meaning that it is a planetary-mass object being neither a planet nor a satellite. Pluto was declassified as a planet by the International Astronomical Union (IAU).

2. Pluto is the smallest dwarf planet in the Solar System, smaller than Earth’s Moon, and half the width of Jupiter’s moon, Ganymede.

3. Pluto’s journey around the Sun takes 248 Earth years. This means that, since its discovery in 1930, it still has over 160 years to go until it has made a complete orbit around the Sun.

4. Pluto’s atmosphere is composed of a thin layer of gas containing carbon monoxide, methane, and nitrogen. Its atmospheric pressure has been estimated to be 1/700,000 compared with that of earth.

5. Pluto orbits the Sun on a different plane than the 8 planets, going over them and below them.

6. Pluto has four identified moons, Charon, the largest is not much smaller than Pluto itself. (Pluto is 2,280 kilometers wide, Charon is 1,212 kilometers wide). The other 3 are Nix, Hydra, and newly discovered S/2011 P 1 on July of 2011.

7. A day on Pluto is equivalent to Earth’s 6 days and 9 hours, meaning that it has the second slowest rotation in the Solar System (after Venus, which takes 243 days to turn on its axis).

8. Pluto’s orbit is elliptical, meaning that it can come closer to the Sun than Neptune, but then go almost two billion kilometers further away from Neptune’s orbit.

9. Pluto is too faint to be seen with the naked eye. When viewed through a telescope, it looks like a star.

10. Pluto is cold: -233° C (-390° F), just 40° C (72° F) above absolute zero. At this temperature, all elements would be frozen except for neon, hydrogen, and helium.

11. Pluto maximum distance from the Sun – 7.38 billion km (4.6 billion miles).

12. Pluto’s minimum distance from Earth – 4.28 billion km (2.7 billion miles).

13. If you weigh 100 lbs, your weight on Pluto would be 7 lbs. (multiply your actual weight by .067).

14. When gazing at the Sun from Pluto it would appear as a tiny bright start because the two are so far away from each other.

15. According to some astronomers, Pluto used to be one of Neptune’s moons, but it somehow broke out of its orbit.

16. Pluto was first located by Clyde Tombaugh in 1930.

17. One of the reasons why Pluto was declassified as a planet was because there are asteroids in the solar system that are bigger than Pluto.

18. Since being declassified as a planet, Pluto’s technical name is now 134340.

  • Terynn

    Im Doing A Project On Pluto…But Its Not In Are Curcime For School..
    But I Dont Care,I Told my teacher that i want to do pluto as my project and he said NO……But i said I ant to write on it WHY it s not a planet and He said Ok What ever……So I Love this website…I go on it Every time we do are projects…
    Thx for being there for me when i need info about Pluto…..:) <3

  • pluto (GOOFY’S DOG)

    they should name the newly discover moon Cerberus (Hades guard dog)

  • earthlover101

    pluto is not a planet anymore for one thing it not a plant because it cross neptunies orbit, it to far form the sun and many more. nice info

  • 3RROR

    All well. At least Pluto isn’t an “unknown” planet.

  • Kayleigh Baylis

    Thanks, these are facts that will make my teacher give me the winning prize of a golden ticket and a certificate and 100 housepoints for homework!

  • http://planetfacts Lux

    This helped me with my project that I have been working on for 3 years. Thank you!
    P.s. I’m the A+ science student in all of the 4th grade.

  • http://thisone!!!!!!!!!!!! ariana

    this is a really neat website I do also need this for science… it is very good info… I also think pluto is a planet no wonder what people say!!!!

  • Ceo Of Planet Facts

    Hello everybody who is using this! just shut the front door and pluto is the smallest dwarf planet in the world!!
    why does ilovechiken person have to talk, shes annoying ;)

  • kate

    OMG Pluto was founded on Febuary 18, 1930 by Clyde W. Tombaugh and became a dwarf planet in 2006!!

  • nate

    what is the length of the year??????????????

  • nate

    what is the ditance from the sun

  • lily

    I like this website,it helps me get resurch for school!
    I have 1 qesten,what is ploto?Is it a moon or is it somthing else?

  • haley

    this is the best site ever i am using this web site to do my
    science booklet it gives
    the most info in the whole site :)

  • mrs barerra

    oh yea do u guys do me a fave by making a awsome drawing or pic of pluto for my project

  • Lauren

    here is some more info:

    From where was Pluto discovered?

    Pluto was discovered from Lowell Observatory in Flagstaff, Arizona It was founded in 1894 by astronomer Percival Lowell.
    Lowell Observatory is among the oldest observatories in the United States.

    Who discovered Pluto?

    Astronomers noticed that the orbits of Neptune and Uranus were being affected by the gravity of an unknown object in this solar system.
    Percival Lowell spent most of his career in the search for Planet “X.”
    Pluto was discovered in 1930 by Clyde Tombaugh.

    Astronomers noticed that the orbits of Neptune and Uranus were being affected by the gravity of an unknown object in ths solar system. Clyde Tombaugh carefully studied images of the night sky and after a lot of hard work he finally discovered Pluto. Clyde Tombaugh was only 24 years old when he made this discovery.

    Does Pluto have moons?

    Pluto has three known satellites (Hubble Telescope), the largest of which is Charon.
    Charon’s diameter is over half the diameter of Pluto, making Charon the biggest moon with respect to the planet it orbits.

    What does Pluto look like?

    Some of the detail that is visible on Pluto (Hubble Telescope) is the presence of polar ice caps as well as large dark spots near the equator.
    The surface temperature of Pluto varies between -391°F and -346°F. The ” warmer” temperatures loosely correspond to the darker areas.

    What is Pluto?

    It has been discovered that Pluto is one of the largest of tens of thousands of objects made of ice, rock, and dust.
    A new mission called New Horizons was launched in 2006 and is expected to fly by Pluto in 2015 and provide much needed information about Pluto.

    What is the Kuiper Belt?

    Discovered in 1992
    Similar to the asteroid belt, although it is far larger—20 times as wide and 20 to 200 times as massive
    remnants from the Solar System’s formation
    Frozen methane, ammonia, and water

    What is the Oort Cloud?

    No confirmed direct observations!
    A hypothesized spherical cloud of comets which may lie roughly 50,000 AU, or nearly a light-year, from the Sun

    Although no confirmed direct observations of the Oort cloud have been made, astronomers believe that it is the source of all long-period and Halley-type[] comets entering the inner Solar System and many of the centaurs and Jupiter-family comets as well.6 The outer Oort cloud is only loosely bound to the Solar System, and thus is easily affected by the gravitational pull both of passing stars and of the Milky Way Galaxy itself. These forces occasionally dislodge comets from their orbits within the cloud and send them towards the inner Solar System.3 Based on their orbits, most of the short-period comets may come from the scattered disc, but some may still have originated from the Oort cloud.36 Although the Kuiper belt and the scattered disc have been observed and mapped, only four currently known trans-Neptunian objects—90377 Sedna, , , and —are considered possible members of the inner Oort cloud.

    i think that should help you with some science project for school :)

  • Andyj

    Web pages like this need constant revision. They have now found a fifth moon orbiting Pluto. Carbon monoxide???

    As far as I’m concerned if it has any atmosphere, moons, sea’s, ice and round enough, it ha to be labelled a planet.

    I call Pluto a planet who’s only reason for demotion by a bunch of stiff necked elitists was it’s discovery was done by a non-qualified man doing the donkey work.

  • ? 00156803200003050911

    I like figuring out about planets & the galaxy to. I agree with Amber_A203148910. She has a good point. Anyone agree? I also like finding out new things & studying science. Who else knows about pluto, neptune or the new planet that looks like earth? jw. I mean i dnt even know about the new planet yet. Do u think 2012 is true?! (jw. idk about it either). <– do u think its real!?

  • ? Amber_A203148910

    I have always wanted to find out more about pluto & all of the other planets. I love to study science & find out about things like neptune. I got a 100% on an assignment about neptune. pluto is actually a planet IF u want to include it like all the other planets. Do u agree? Does anyone or has anyone found out anymore information about the new planet they found. they say that it looks just like earth.

  • http://bing sarah

    this website rocks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! my teacher suggested it. she is soooooooooooo awesome!!!!!!
    did you know that pluto was not considered a planet anymore because crossed neptune’s orbital plane??????

  • http://facebook musicgirl

    glad i found this website

  • musicgirl

    this saved my butt for my science project on pluto

  • 9

    In the ‘Atmosphere of Pluto’ article, it states that “The ices on the surface of Pluto derive nitrogen, methane and carbon monoxide gasses.”

    In other articles on this site, it states there are traces of “Nitrogen, methane, and /carbon dioxide/ gasses, not carbon monoxide.

    This is a great site, but some of the information is either inconsistant or stated way too many times over. There are also a few facts on here that should be updated, and it would be nice to know the year this was posted, so any dates could be compared to the present date.

    Also, it is very controversal about wether or not Pluto is a planet or a dwarf planet. It is still a largely debateable concept, so instead of taking one site as if it is truely and officially accepted, it would be more correct to stay away from stating ‘the planet’ or ‘the dwarf planet.’ (Which, is also, as stated above, inconsistant. Some articles on this site state Pluto as a planet. Others state it as a dwarf planet).

    Once again, this is a very good site for information, but I do not believe all of this to be true/ fully correct. A review and revision of the whole site would be appreciated.


  • tata

    wow this r the most intresting factsi really lke this site. i no it sonds neeky but it really is intresting lool, i think i’m ganna coe on thi site eveyday lool :)

  • Jim Pallutto Sr.

    Is there a possibility that Pluto will add enough mass to actually achieve planetary status again? If not, is there anyplace where another planet could form or is our solar system too developed for this possibility?

  • Feli

    Cool stuff

  • http://plutofunintrestingfacts Sadaf

    Perfecttttt project due in 2 days love this website :)

  • Synergy

    Weight conversion is wrong in number 15.

  • tgif

    omg its like the dog on mickey mouse club house

  • iLikePie

    Pluto isn’t a planet. If so call Jupiter the 6th planet because Ceres will be the 5th. Infact there would be about 14 (If you include 2003UB131). Demoted in 2006 because Eris was found and slightly smaller objects in the Kuiper Belt. Pluto is a Kuiper Belt Object along with 2003UB131, Eris, Makemake and Haumea. Just except it. A Dwarf Planet unless you’re used to the Plutoids, Eris, Haumea, and Makemake, making Ceris the only Dwarf planet.

  • MissSparklyHaterGirl

    was reading these comments……
    pluto actually has 4 moons katelyn, not 3

    I <3 this website!

  • MissSparklyHaterGirl

    5 Pluto Facts
    1. New Horizons will be making its closest approach to Pluto in July 2015, and is carrying some of the ashes of its discoverer, Clyde Tombaugh.
    2.Aphelion (farthest)
    English: 4,583,190,000 miles
    Metric: 7,375,930,000 km
    3.Perihelion (closest)
    English: 2,756,902,000 miles
    Metric: 4,436,820,000 km
    4.Internal structure: Probably a rocky core surrounded by a mantle of water ice, with more exotic ices such as methane and nitrogen frost coating its surface.
    5.It remains unknown whether Pluto has a magnetic field, but its small size and slow rotation suggest it has little to none .

    Comment about my Comment and maybe I’ll post more!

  • HaterGirl

    Hey people :D gonna post some of my own Pluto facts…….. Enjoy & Comment!

    1.Pluto is the second biggest known dwarf planet in our solar system, after Eris.
    2.It has an axial tilt of 120°
    3.Pluto’s atmosphere consists of nitrogen, methane, and carbon monoxide gases

    I might post more…. I love this website!

  • http://idk jackson

    pluto has 4 moons

  • Malissa

    It would be nice to update this site because Pluto isn’t the ninth planet anymore….Ask someone and update your site before you put it on the internet please… thanks. Oh, and by the way… It would improve your site like MAJOR! if you updated it once in a while and actually read the comments and found proof on the internet. Some people hear are aware of more facts then you I’m sure. So please check the comments once and a while and update the site. And, I’m just guessing here, either this site is really old and hasn’t been updated or the person previously made this site and just doesn’t believe Pluto is not a planet. Some people still believe that. So yeah. Update, revise, re- look (for more facts ) and read comments ( let your viewers know you care…. if you do care O_O) -Viewer :D but over all the ” need update ” facts this is a pretty good site :) good job! but still improve.

  • Miss.Daisy

    This is a very helpful website.It helped me with my Science project which is due tomorrow.

  • Melody

    This was a very helpful website for my Science project, and it was just cool to learn the facts. Btw PLUTO IS STILL A PLANET!!!!!!!!!!! I’m not saying that everyone said that

  • Laurel Kornfeld

    Pluto is still a planet, as are Ceres, Haumea, Makemake, and Eris. Only four percent of the IAU voted on this, and most are not planetary scientists. Their decision was immediately opposed in a formal petition by hundreds of professional astronomers led by Dr. Alan Stern, Principal Investigator of NASA’s New Horizons mission to Pluto. Stern and like-minded scientists favor a broader planet definition that includes any non-self-luminous spheroidal body in orbit around a star. The spherical part is important because objects become spherical when they attain a state known as hydrostatic equilibrium, meaning they are large enough for their own gravity to pull them into a round shape. This is a characteristic of planets and not of shapeless asteroids and Kuiper Belt Objects. Pluto meets this criterion and is therefore a planet. Under this definition, our solar system has 13 planets and counting: Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Haumea, Makemake, and Eris.

  • girlcool

    i can not believe that pluto is a drough planet now so freaken cool man!!!!! so i need to see more :)

  • gracyn

    I love this website i needed help on a project and i got every thing i needed thank you so much!!!


  • chelsea

    Hi my name is Chelsea Thomas an d i as wondering what is Pluto mass and if you do not know somebody give me some websites!

  • Shaylee

    This is a great site but not all of the stuff is valid

  • sara

    this is the coolest website ever……………….

  • elona

    pluto has an atmosphere containing methane gas and envelopes of carbon monoxide

  • Marc

    I DONT LIKE IT EITHER, but if you look at the facts, making Pluto a Dwarf Planet IS justified. There are actually BIGGER objects orbiting in the Kuiper Belt, which is where Pluto resides, like Eris, which is 25% bigger than Pluto. If they classified Pluto as a planet, they would have to do the same to many more objects in the Kuiper Belt!
    One thing I think they HAVE done wrong is not to classify Pluto a Binary Dwarf Planet, Which it is! Pluto and Charon orbit each other, with Charon being approx 50% of Pluto’s mass. they orbit a point just above Pluto’s surface. Making them a Binary System.

    P.S. Did anyone else notice fact number 6 and fact number 10 are EXACTLY THE SAME!?!

  • james

    Pluto is a planet, don’t you guys get this?
    Why are there so many comments that say Pluto is not a planet? Or even worse, just talk about the website. Please, I want more people saying Pluto is a planet. It is my favorite planet in the universe. Don’t you guys get this? I’m getting so mad. If Mercury got kicked out of the solar system, there would be just like 4 comments. And the same with like Neptune, not be a lot of comments. I’m so mad with the people that don’t call Pluto a planet. And Pluto does exist!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  • kayden

    i think pluto is not a planet because all the other planets have thier own orbits

  • Taron

    I think it is a planet because just becuse it is small and the farthest from sun so it is a PLANET PEOPLE BELIVE ME!!!!!!!!!!

  • sexy beast

    this website sucks