How Many Planets Are There in the Solar System?

Home Science 03 April 2011 75135 Views
How Many Planets Are There in the Solar System?

There are 8 major planets in our solar system.There were 9 planets which including Pluto too.International Astronomical Union decided that Pluto is no longer a planet , it is a dwarf planet.There are 5 dwarf  planets.

Planets from 2006 to present (8) :

Mercury  Venus     Earth     Mars     Jupiter     Saturn     Uranus     Neptune

Dwarf planets from 2006 to present (5) :

Ceres     Pluto     Makemake     Haumea     Eris

Planets from 1930 to 2006 (9) :

Mercury     Venus     Earth     Mars     Jupiter     Saturn     Uranus     Neptune     Pluto

Planets from late 19th century to 1930(8)  :

Mercury     Venus     Earth     Mars     Jupiter     Saturn     Uranus     Neptune

Planets in early 19th century (11) :

Mercury     Venus     Earth     Mars     Vesta     Juno     Ceres     Pallas     Jupiter     Saturn     Uranus

Planets and Dwarf Planets in the Solary System


Source: 1

60 responses to “How Many Planets Are There in the Solar System?”

  1. Our solar system does NOT have only eight planets, and it is far more than a minority of scientists who still view Pluto as a planet and a Kuiper Belt Object. The same is true for 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.

  2. rc gliders says:

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  7. Chuck says:

    Actually Laurel, all of your information is completely incorrect. Pluto is not spherical at all, in any way. Pluto is shaped closer to a cone, but jagged and shapeless. Pluto, Haumea, Makemake, and Eris, are all asteroids that were caught by the Sun’s orbit. Pluto also crosses Neptune’s orbit twice a year.

  8. Latif says:

    There over 40 dwarf planets and counting

  9. renee says:

    i think ceres is an astroid like the dwarf planets

  10. Chris says:

    @ Chuck – you are wrong in every sense of the word. Pluto is just as round as the Earth is, as are Eris, Ceres, and the other 2 that nobody cares about. Pluto is just as much of a planet as Uranus, Mercury, and Earth.

  11. Ali Harb says:

    In Quraan it is mentioned that there is 11 planets other than Sun and Moon. So definitly there is 11 planets. All human answers are in Quraan but we have to read and know.

    • V Bellator says:

      I think you may be in the wrong place.

    • Janet says:

      Hey ali u need to speak the truth every human answer
      Is not in the quran but in the sumarians history amoung
      un truthfull book quran is one of them its copied from
      Other books sorry I dont mean to be mean I did my
      reaserch .

    • shaheen sajid says:

      i think ur right **

    • Lance says:

      11? First of all thats not even correct, second the sun is a star, and the moon is…a fucking moon. Arabs also said the earth is flat in 1993, and said man will never go to outer space, right before we went to outer space. In no calculation of addition, subtraction, or obsoletion can you arrive at the number 11 for the planets in the Milky Way Galaxy. Please do not bring religion into science, fairy tales and facts do not mix. And before you go jihad on me I’m not just attacking your religion, or attacking religion at all. The Christian bible says god made the sun and the stars on the 4th day. Well how do you have 4 days without a sun to orbit around? I side with several other people that there are still 9 planets, since the reasoning discounting Pluto was essentially just on it’s size and orbitational pattern. The fact is it is still a sphere, it does not light itself, and it orbits a star. Not that I am the expert but switching it to a Dwarf planet was so strongly opposed in the science field, and so many scientists still stand by it as a planet, that I do not find enough evidence or reasoning to consider it a dwarf. But again, my opinion doesn’t really matter. Just dont count them based on a book written by cattle sacrificing primitive’s that believe the earth was made in seven days, or that man is to practice religious conversion at the point of a sword. If you want to believe something that has been shown to be fundamentally false time and again, that is your right, and noone is going to stop you. But please stop trying to get the rest of us to buy in to fiction, when we have plenty of facts to the contrary.

  12. Leroy Brown says:

    just because pluto, ceres, haumea, makemake, eris, and countless other “dwarves” may be asteroids, that does not mean that Mercury, Venus, Earth, or Mars wasn’t an asteroid, and they became planets!! So Pluto Ceres Haumea Makemake and Eris are all planets whether they are “dwarves” or not!!!!!!!!!!!!!!!!!!!!!

  13. irfan says:

    Its good for my homework

  14. lano says:

    yes os corse it is good for homework for sience

  15. cqdyevens says:

    perfect goodthis present reasonable to get not anything 🙁 hahaha merely fooling 😛 nice post 😛

  16. miranda england says:

    There’s 3 things to consider it a planet. Which pluto only meets 1. Yes it orbits the sun no its not sphere and its not able to clear objects from its orbit.

  17. Jeff Coll says:

    Pluto should be a planet. I’m just amateur astronomer, but there should be no reason why Pluto should not be included along with the other planets. Pluto has an orbit just like any other planet, however eliptical it may be. yes I agree it is very small but it should not be disqualified as a planet just simply because it does not look like on the other planets and it’s not completely round. if were going to get that technical about planets, then I suggest that we consider the gas giants, which we’re not even sure have any definite planeit structure on the inside, should they be disqualified as planets too? Besides it would confuse all of the first-graders when they are trying to memorize the nine planets. Should we change the rhyme to say my very excellent mother just served us nuts?!!

  18. Belal says:

    Hey V Bellator, Ali Harb IS in the right place. I am not sure about the rest of you though. The Quran says there are 10 planets (11 only in Abraham’s dream – Sura 12, the 11th is imaginery). If you guys are really serious about astronomy, planetary systems, inter stellar material,creation of the worlds (yes, plural), the process of the formation of the universe, read Quran. But before you do that, just to get intellectually ready for it, read “The Bible, The Quran and Science” written by Dr. Maurice Bucaille. The book was originally written in French, but translated by Alastair D. Panell. It will take you to a completely different level, scientifically speaking.

  19. Freshkid_- says:

    13 planets wow i neveer new lol 😀 🙂

  20. Freshkid_- says:

    i might do my science fair on this thinng 😉 thanks guys

  21. Freshkid_- says:

    *my science fair project i meant this blog is helpful thks again 😎 8-( 8-/

  22. keepitreal says:

    Dwarf planets are planets. Human dwarfs are still human aren’t they? Just because they are dwarfs does not mean they are not people just like you and me. They have the same anatomy, just in a mini kind of way. So it is the same with dwarf planets, they are real planets

  23. Amazon says:

    I am not real fantastic with English but I line up this really leisurely to read .

  24. sarah says:

    i don’t think there’s life on mars

  25. Hamza says:

    According to the Quran ” muslim book” there are 11 planet. The Quran was sent by Mohamed 1400 years a go.

  26. Joshywa says:

    what about planet x?

  27. Rex says:

    Why do people have to bring their religion in every discussion , guys we know that you are insecure about your religion and all but please dont force it on other people by saying , please read this and please read that , read the post and get on with your life . period .

  28. unown says:

    there are many planets which will be soon discovered!

  29. Gerry Claes says:

    There are 8 planets in the solar system (until another planet beyond the Kuiper Belt is discovered). I suggest your read Mike Brown’s excellent book on this subject: “How I killed Pluto and why it had it coming”

    Alas Pluto was demoted to the status of Dwarf Planet and therefore there are only 8 planets currently in the solar system. The book gives the logic behind this decision by the IAU.

  30. carly says:


  31. carly says:

    what up i <3 planets

  32. jnn says:

    owsome tips thanks

  33. shaheen sajid says:

    very well but i belive the quraan as it says and its the truth *

  34. david says:

    for goodness sake there is no god … the bible or any other reference is nonsence …. we r talking science pure and simple get the facts correct. No God No ET nothing just us by pure fluke and who cares how many planets 8/9/27/ or 36 round square triangle its irrelevent we will all be extinct b4 to long

  35. shem says:

    I came from planet vegeta. =)

  36. mr k says:

    nice discover but there is only 1 god in this entire universe that is u if u do good the god is u and if u do bad the god is not there please remember this forever this word is got in every bible, quran, mahabharatha and all.

  37. me says:

    peole stop with the religeon im only a pre teen but i know when to use religion and when not to this is sience

    • William says:

      We shuld 4get God n talk bout sex right? Jesus is an issue we wil al ve to settle, n if u ve done d@ u wil ve no probs My friend! N 4 d topic i think there is only one planet, we should cal d rest sumtin else!

  38. Ron says:

    We will wait for a better Telescope new technology in order to clear all doubt on this planets…

  39. assyrian says:

    You muslim ppl are funny, you think you know it all. Your quran is full of bullshit and the rest is copied from other books like the ( bible). hahaha you make me laugh.

  40. jayachand says:


  41. Justinix says:

    I am pretty sure there are 7-dwarfs….Ceres Pluto Makemake Haumea Eris Grumpy and Bashful…


  42. erinm says:

    We know Pluto is a planet because the Hubble Space Telescope (Feb. 2012) took photos … is definitely round, has its own gravity and has its own moons (4), named Charon, Hydra, Nix and S2011/P1. NASA’s “New Horizons’ spacecraft will reach Pluto in 2012 for a fact finding, photo-taking session.

  43. marisela says:

    i have a science project due in two weeks and my school gave all the kids three months to work on it thanks to you guys i can have it done in three days yes!!!!!!

  44. Markus says:

    there are more in the big galaxy then the man can see you think Ggod just stop sciencetist dont know nothin

  45. Wisdom Nwoke says:

    There were 8 planets ‘Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune’ before the discovery of 5 other dwarf planets ‘Pluto, Ceres, Haurea, Eris, and Makemake.’ In brief, there are 13 Planets of which 5 Planets are called DWARF PLANETS because they are smaller in nature and they lack certain features compared to other 8 Planets.

  46. Lloyd Ocular says:

    there were 8 planets of our solar system have been left as the major planets because pluto didn’t pass the criteria.But actually tere are 15 planets in our solar system including tose dwarf planets (pluto,ceres,eris,haurea,makemake,and the other two dwarf planets.

  47. JDGBoyz1 says:

    I have an idea to rid the solar system of some planets. Add a 4th criteria. A planet must have or at one point in time had an atmosphere. That goes for dwarf planets. Saying an asteroid, Ceres, is any kind of planet is just ridiculous. Thats like calling Halley’s Comet a dwarf planet. It goes around the sun, has a rotation on its axis, and its self illuminating. Just for fun, the gas giants have a solid core of at least carbon. If Jupiter didn’t have a solid core we would be a two star system. Now to discredit myself. I have been studying the solar system since I was a kid, watch the moons of Saturn go from 16 to 62+ hundreds of moonlets. I have no credentials in schooling or otherwise. Just that when you see a light in the sky, don’t assume its a star. I might be a planet. Peace

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