2006-09-05 06:37:06 · 8 answers · asked by anti_move 1 in Science & Mathematics ➔ Earth Sciences & Geology
it has an irregular orbit, taking its path inside neptunes orbit and far outside it as well. Also, its orbital plane is inclined to the plane of the other planets. It resides amongst lots of other similar objects within the Kupier Belt. Thus, I think it would be better described as a comet. Its mass is less than one percent of earths. I believe our moon may be larger. If you called Pluto a planet, scores of other objects would also be a planet. The moons of Jupiter and Saturn are much more interesting worlds than tiny ice-ball pluto. I personally would rather see Sedna be considered a planet than pluto. May be smaller but at least it isnt claiming to be a planet when its really an orbiting iceball.
2006-09-05 06:39:20 · answer #1 · answered by vanman8u 5 · 0⤊ 0⤋
The easy answer is that there's not a definition of "planet" that includes Pluto but does not include at least three other bodies now, and potentially dozens more as we better discover the Kuiper belt.
By the way, Pluto is now known as a "dwarf planet", along with Charon, its sister-dwarf, Ceres, the largest object in the asteroid belt, and 2003 UB313, aka "Xena." The difference between these and the other 8 planets is that they do not keep an orbit to themselves.
2006-09-05 06:40:24 · answer #2 · answered by rorgg 3 · 0⤊ 0⤋
primary reason, because it hasn't cleared the path around its orbit - it crosses nuptune's orbit. The problem is that neptune crosses pluto's orbit but neptune is still a planet even though it doesn't meet the definition of a planet. so the issue hasn't been resolved and will have to be revisited hopefully soon.
2006-09-05 06:44:25 · answer #3 · answered by waplambadoobatawhopbamboo 5 · 0⤊ 0⤋
More lies from George Bush classified it as a planet in the first place.
2006-09-05 06:44:57 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Easy it owed 6 month back dues! You don't Really think them planets get there for free, do ya? LOL
http://www.total-knowledge.com/~willyblues/
2006-09-05 06:40:25 · answer #5 · answered by Anonymous · 0⤊ 0⤋
The main reason is that it's orbit intersects with Neptune's.
2006-09-05 14:06:28 · answer #6 · answered by jasmesny 2 · 0⤊ 0⤋
Surface area, lack of atmosphere?
2006-09-05 06:41:43 · answer #7 · answered by robert s 5 · 0⤊ 0⤋
Because its not as interesting to talk about as URANUS!!!!
2006-09-05 06:39:25 · answer #8 · answered by gene_harden2000 3 · 0⤊ 0⤋