International forum: Other - Is there any existing planet aside from official 9 planets recognized by majority!
Share this topic
14 Apr 2014 05:36

Mythology believe about the existing of others planet..
Do you think that is possible?

14 Apr 2014 07:03

Sir, there are only 8 planets now officially. Pluto is not a planet anymore.

14 Apr 2014 07:14

In 2005, Mike Brown discovered Eris, an icy object thought to be about the same size as Pluto, out beyond its orbit.
That would bring the total number of planets to ten. Right? There’s no turning back, textbooks would need to be changed.
The Solar System. Image Credit: NASA
In order to settle the dispute, the International Astronomical Union met in 2006, and argued for, and against Pluto’s planethood. Some astronomers advocated widening the number of planets to twelve, including Pluto, its moon Charon, the Asteroid Ceres, and the newly discovered Eris.
In the end, they changed the definition of what makes a planet, and sadly, Pluto doesn’t make the cut:

14 Apr 2014 07:14

Here are the new requirements of planethood status:
1.A planet has to orbit the Sun. Okay fine, Pluto does that.
2.A planet needs enough gravity to pull itself into a sphere. Okay, spherical. Pluto’s fine there too.
3.A planet needs to have cleared out its orbit of other objects. Uh oh, Pluto hasn’t done that.
For example, planet Earth accounts for a million times the rest of the material in its orbit, while Pluto is just a fraction of the icy objects in its realm.
The final decision was to demote Pluto from planet to dwarf planet.

14 Apr 2014 07:41

It is official that Pluto does not belong to 9 planet?

14 Apr 2014 18:20

Quote by clixsters
It is official that Pluto does not belong to 9 planet?

its n0t official kua 4 wherein its still in our textbooks thats says pluto is included to our s0lar system but base on sum astron0mers it does n0t belong..and it takes times to be officialy declared that our solar system consist only of 8planets...they need to change our curriculum in earth science if they declared that...and its n0t that easy.

15 Apr 2014 01:33

Quote by quiete
Quote by clixsters
It is official that Pluto does not belong to 9 planet?

its n0t official kua 4 wherein its still in our textbooks thats says pluto is included to our s0lar system but base on sum astron0mers it does n0t belong..and it takes times to be officialy declared that our solar system consist only of 8planets...they need to change our curriculum in earth science if they declared that...and its n0t that easy.

Correct!

15 Apr 2014 07:54

I don`t know about!

15 Apr 2014 08:54

Quote by Wafa-waseem
I don`t know about! :D

humble effect!! hehe

10 Dec 2015 09:30

Astronomy is the weakest place in my life

10 Dec 2015 10:55

Sir, before really be official 9 planets But
International Astronomical Union in 2006 created
"the dwarf planet" category, which be three objects:
Ceres, Pluto and Eris. Eris is much larger as Pluto.
Pluto has been set aside as the ninth planet in the
solar system. Now Pluto assigned to the dwarf planets

10 Dec 2015 11:01

Thanks