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Well i see that the solar system must be the sun and 8 planets revolving around it and two belts one between Mars and Jupiter (asteroid belt)and the other after Neptune (Kuiper Belt or the plutons as they named)..... and so we could say that the solar system is the sun followed by Mercury then Venus then Earth then mars then the Asteroid belt (containing the object Ceres that they now want to include as a planet in the solar system - and in my opinion it cant be called a planet) then Jupiter then Saturn then Uranus then Nepton then the Kuiper Belt (including in it all the plutons -Pluto itself and Charon and UB313 (Xena)-)
and so pluto is no more a planet and if u wanna call it a planet then dozens of other bodies revolving around the sun should be called "planets" how ridicolous it is, will we end having 46,592 planets after few years on more objects discovery or what!!!! think about it people PLUTO CAN NEVER BE ANYMORE A PLANET!
plz write your opinion

2006-08-16 07:15:46 · 9 answers · asked by amreltayebie 1 in Science & Mathematics Astronomy & Space

9 answers

In the proposed definition of a planet, the object has to be large enough to become spherical under its own gravity. The only object in the asteroid belt with this property is Ceres. Ceres is also an asteroid, and is the largest asteroid. In the same way, Pluto, Charon, and Xena are plutons, but they are also planets. We won't have 46,592 planets even if we have that many plutons or asteroids simply because most of the plutons and asteroids aren't large enough for their gravity to make them spherical. Even Pallas, Juno, and Vesta aren't big enough for that.

Truthfully, this seems like a very reasonable compromise. Most pluons won't be planets, but some will just as most asteroids won't be planets. Pluto gets to stay in the planet club even though it is also a pluton. Ceres gets promoted to a planet because it is just big enough to qualify.

2006-08-16 07:29:22 · answer #1 · answered by mathematician 7 · 3 1

The International Astronomical Union (IAU) may adopt Xena as the name for UB 313. Michael Brown of the California Institute of Technology who discovered the planet nicknamed it Xena after the warrior princess of TV fame. He chose Xena because it would be the 10th planet which is "X" in roman numerals. Gabrielle is the proposed name for the moon of Xena.

The 12 planets in our solar system listed in order of their proximity to the sun would be Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Charon, and Xena (UB313). Pluto's largest moon, Charon; and the asteroid Ceres would be categorized as planets. Pluto would be categorized as both a planet and a pluton. Both Pluto and Charon each are large enough (massive enough) to be spherical. Both bodies independently satisfy the definition of “planet”. The reason they are called a “double planet” is that their common centre of gravity is a point that is located in free space outside the surface of Pluto.

The center of gravity for the Moon's orbit is in the center of the Earth. The Moon truly orbits the Earth.

The new definition of a planet: any round object larger than 800 kilometers (nearly 500 miles) in diameter that orbits the sun and has a mass roughly one-12,000th that of Earth. Moons and asteroids will make the grade if they meet those basic tests.

The growing category of "plutons" - Pluto-like objects that reside in the Kuiper Belt, a mysterious, disc-shaped zone beyond Neptune containing thousands of comets and planetary objects.
Plutons are distinguished from classical planets in that they reside in orbits around the Sun that take longer than 200 years to complete (i.e. they orbit beyond Neptune). Plutons typically have orbits that are highly tilted with respect to the classical planets (technically referred to as a large orbital inclination). Plutons also typically have orbits that are far from being perfectly circular (technically referred to as having a large orbital eccentricity). All of these distinguishing characteristics for plutons are scientifically interesting in that they suggest a different origin from the classical planets.

2006-08-16 18:33:59 · answer #2 · answered by Anonymous · 0 0

I like what the IAU has proposed. They chose natural criteria to define a planet. The only other choice is to make an arbitrary cutoff, the debate over which could be never-ending. Think about what happens if they define a planet as anything over 4800 km, and a distant object is found that's determined to be 4790 km. in diameter. Shouldn't that be a planet?

The only thing that could wreck this decision is the discovery of a 5000km potato-shaped object, and that's pretty unlikely.

Planet Ceres is currently about 13° south of Neptune, in Piscis Austrinus. I think everyone with a telescope should go out and look for it tonight.

2006-08-16 07:42:46 · answer #3 · answered by injanier 7 · 1 0

It's a waste of time to spend time defining what is a planet just so the news and laymen have something to talk about. Just leave it at nine for the kiddies and anybody doing advance studies can learn about the other stuff.

If it goes to 46,592, atleast science fairs will not have anymore models of the solar system.

2006-08-16 07:23:19 · answer #4 · answered by Grant d 4 · 1 1

I hope you feel really bad right now. Hurting poor little ol' Pluto's feelings like that. You should be ashamed. Sure he's not the biggest, and he's not the fastest, but he does have an atmosphere and a handful of moons! He's a good planet and you should apologize.

2006-08-16 07:24:02 · answer #5 · answered by Dallas M 2 · 2 2

Don't worry it looks the the IAU is going to decide in favor of more planets.

2006-08-16 07:29:40 · answer #6 · answered by Search first before you ask it 7 · 0 0

pluto is an asteroid, but its the size of mercury. thats why people consider it a planet

2006-08-16 07:25:27 · answer #7 · answered by Anonymous · 0 2

Why not. What is wrong in having million planets.

2006-08-16 07:22:50 · answer #8 · answered by Dr M 5 · 0 1

Please, why are ppl concerned about the solour system. the only reason nasa exists is to try and prove that an impossible theory is fact. evoultion is not even a valid hypotesis(someone said this)

2006-08-16 07:25:44 · answer #9 · answered by . 3 · 1 2

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