which is the 9th planet?

Answer 1

PLUTO IS NO LONGER A PLANET maybe Eries I think
scientifically UB313 is still in discussion

Answer 2

At this point there are only 8 planets,, thats because pluto was demoted to a minor or dwarf planet and is no longer considered a planet,, So Pluto was the ninth planet of the solar system

Answer 3

The 9th planet is Pluto

Answer 4

There are only 8 planets. Pluto is not a planet. (It never was in my opinion) To any sane person it is a minor planet at best. Why cant some people who answer accept facts, it's not going to change the IAU's opinion, so stop feeling sorry for a piece of detritus which has nothing to do with Mickey Mouse.

Answer 5

Pluto was classified as the 9th Planet for many years , though some Goose of an Academic nature some-where in the U.S decided it didn`t fit into Category any-more , so they canned it!

I do re-call some-thing in the news that another had been "Discovered" in-side our Solar System , but not confirmed or classified , as yet!

I believe it was dubbed .... Aurion (or-ryan) or some-thing similar , BUT , that still leaves us with only 8 recognised Planets and DOESN`T really answer your Q , does it?
Sorry....!

Answer 6

Today? I think it is still Pluto. Let me check to be sure. I also have to check if Pluto or another one of them lost planetary designation.

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Every 248 years the two planets swap places and for about 20 years Pluto becomes the eighth planet and Neptune the ninth.

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Yes it is Pluto again
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Feb 17, 1999: In 1979 the Solar System became a bit mixed up. That's when Pluto, which travels in a highly elliptical orbit, temporarily moved closer to the sun than Neptune. Every 248 years the two planets swap places and for about 20 years Pluto becomes the eighth planet and Neptune the ninth. This topsy-turvy situation was rectified last Thursday, Feb. 11, when Pluto crossed Neptune's orbit and became the ninth planet once again.
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Yes, pluto is still a planet, a "dwarf"planet by the most recent changes in names
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The recently adopted IAU resolution states that "planets" and other bodies in our Solar System be defined into three distinct categories in the following way:

1. A "planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.
2. A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape2 , (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.
3. All other objects3 except satellites orbiting the Sun shall be referred to collectively as "Small Solar-System Bodies".

So by this official definition there are exactly eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto, Ceres and Eris (aka 2003 UB313) are "dwarf planets" with a potentiall large number of additional object falling into this category in the near future.
http://www.seds.org/billa/tnp/help.html

Answer 7

since the discovey of the 8th planet 1846,there has been consideerable speculation that another planet might exist beyond the orbit of neptune.in the years sinse then some hypothenised bodies from the trans-neptunian region have been identified as 9th or 10th planet

Answer 8

Pluto

Answer 9

Pluto was the 9th planet (in this solar system anyway...) but it lost it's status.

Poor thing...

Answer 10

pluto isnt a planet anymore
so there technically isnt one
it was at one point when it was first found catagorized as one - but thats cuz we were so excited we found it.. then we realized how frickin far away it is.. and the details .. and now its not even a planet