Are there more than 9 planets?

Question

when i was in third grade, my teacher taught that there are more than 9 planets. is it true?

Answer 1

In the universe their are probably over a billion planets as their are millions or billions of galaxies.

Answer 2

Are There More Than 9 Planets

Answer 3

If you are speaking in terms of our Solar System, the answer is no. There are less than 9 planets in our Solar System. There are 8. Pluto was demoted under the definitions of a planet in 2006. The addition of any more planets in our Solar System to the existing 8 is unlikely. Besides our 8 planets, there exist dwarf planets and planetoids. Outside of our Solar System, planets are being discovered around other stars at an ever increasing rate. In just the last two years, the count has gone up from 157 exoplanets to 250 as of 2007 September.

Answer 4

There are some large comets orbiting the Sun at a distance very far from Pluto that can be clasified as planetoids (almost as big as what a planet should be) and there are some planetoids in the mid-solarsystem asteroid belt. By the way, scientist no longer consider Pluto as a planet, much to my dismay, so now it's just a chunk of ice that once was a planet, so now we have eight official planets. If you are talking about planets in the universe, yes, there are many planet in the universe circling other stars, in our galaxy and others.

Planetoid come in varying sizes, I know of some to span a couple of miles to ten miles or so.

Answer 5

Taken without put off from the international Astronomical Union: Q: In undeniable language, what's the recent definition of “planet”? A: A “planet” is an merchandise in orbit around the sunlight it incredibly is sufficiently massive (super adequate) to have its self-gravity pull itself right into a around (or almost around) shape. besides a “planet” orbits in a clean course around the sunlight – there are not the different bodies in its course that it may sweep up because it is going around the sunlight. Q: Why is there a elect for a clean definition for the be conscious “planet”? A: present day technological know-how grants lots greater wisdom than the essential actuality that products orbiting the sunlight seem to go with appreciate to the historic past of fastened stars. to illustrate, modern new discoveries have been created from products in the outer areas of our photograph voltaic device that have sizes such as and larger than Pluto. (Noting that traditionally Pluto has been called “the 9th planet.”) for this reason those discoveries have rightfully called into question despite if or no longer they could be seen as new “planets.” Q: Why is Pluto now called a dwarf planet? A: Pluto now falls into the dwarf planet type as for this reason its length and the reality that it is residing interior of a zone of different products, standard as a results of fact the Kuiper Belt.

Answer 6

Unless you were in 3rd grade last year your teacher was correct.

In 2006 the International Astronomical Union (IAU) took a vote on a new definition of 'what is a planet'. In accepting the new definition, Pluto was re-classified as a 'Dwarf Planet' (a poor choice of words since the IAU explicitly stated that a Dwarf Planet is NOT a type of planet) and is joined by 2 other solar system bodies - CERES (the very first asteroid discovered) and ERIS (the largest NON planet discovered - even bigger than Pluto).

We will undoubtedly continue to discover newer and larger objects out in orbits beyond Neptune, brothers and sisters to Pluto and ERIS. Considering how long Dr Brown sat on the discovery of ERIS, who knows, we may already have discovered bigger objects - even a new planet! (ERIS was discovered in 2003 but its nature was not publically announced until 2 years later)

Answer 7

no there is not more than 9 or 9 planets of sun
thre was nine planet...but we lost pluto from the list of planets
so we have only 8 planets now

Answer 8

In our solar system there are officially only 8 planets. Pluto got demoted several months ago and is no longer officially a planet. Beyond our own solar system, though, we've found about 250 other planets.

Answer 9

Absolutely Sorta yes.

I'm sure there are more out there that we've overlooked, as we overlooked Eris (the 10th "planet" was found in july 2005)
http://en.wikipedia.org/wiki/Eris_%28dwarf_planet%29

PLUTO and ERIS are now considered "dwarf planets"
only by definition, (since 2006)
http://en.wikipedia.org/wiki/2006_redefinition_of_planet
It really doesn't have anything to do with the size of the planet

They called pluto a Dwarf Planets because it does not completely orbit the other planets in our system.





Check out the pass Pluto makes into Neptune's orbit
http://www.iki.rssi.ru/nineplanets/gif/dobro1.gif

check out Eris and its crazy orbit
http://upload.wikimedia.org/wikipedia/commons/d/dc/Eris_Orbit.svg

Answer 10

Pluto has been proven not to be a planet. Now there are supposedly 8. That may be only in the Milky Way Galaxy. Others may be out there.

Answer 11

In our solar system there is only 8 planets but we know about over 200 planets that arn't in our solar system.