About pluto?

Question

So, i dont understand. Why is Pluto not going to be considered a planet anymore.....

Answer 1

The International Astronomical Union went with a much more conservative definition. Pluto has been demoted to a "dwarf planet, resulting in a decrease in the number of "classical" planets in our solar system to eight. From the Associated Press:
Much-maligned Pluto doesn't make the grade under the new rules for a planet: "a celestial body that is in orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a ... nearly round shape, and has cleared the neighborhood around its orbit."

Pluto is automatically disqualified because its oblong orbit overlaps with Neptune's.

Instead, it will be reclassified in a new category of "dwarf planets," similar to what long have been termed "minor planets." The definition also lays out a third class of lesser objects that orbit the sun -- "small solar system bodies," a term that will apply to numerous asteroids, comets and other natural satellites.

Answer 2

Because the Astronomical Union wanted a definition of a planet, and Pluto didn't meet the new criteria. There has been debate on Pluto's planetary status since it was discovered in the 1930s.

Answer 3

Becuase under new international regulations Pluto is too small to be considered a planet. There has been arguement since it was first discovered as well as the whole subject of how it crosses Neptune's orbit as it travels around the sun. Now it is going to be classified as a dwarf planet cutting the solar system down to 8.

Answer 4

Pluto in Scorpio solar sq. Pluto Moon sq. Pluto Venus Trine Pluto Saturn Semi-sq. Pluto Uranus Semi-sq. Pluto Neptune Sextile Pluto - maximum human beings have it Pluto Bi-Quintile Ascendant

Answer 5

At a recent convention of atronomers, it was decided that a planet had to meet certain criteria to be defined as a planet. One of these is that the planet has to have eliminated other bodies from its orbit. There are many thousands of objects in the area of Pluto.

Answer 6

the international astronomical union defined three terms "planet", "dwarf planet", and "small solar system body". this does not change anything about the solar system or pluto. it just corrects the mistake of classifying pluto as a planet initially. i actually feel somewhat vindicated. i have known since i was about twelve that pluto did not have the physical and orbital characteristics of the major bodies in the solar system. later, after the discovery of hundreds of similar bodies in similar orbits, i knew this was inevitable.

(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 neighborhood 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) shape, (c) has not cleared the neighborhood around its orbit, and (d) is not a satellite.

(3) All other objects orbiting the Sun shall be referred to collectively as "Small Solar System Bodies".

because pluto orbits the sun, is round, orbits the sun with a bunch of other similar bodies with similar orbits, and is not a satellite it is a dwarf planet.

look here:
http://www.iau2006.org/mirror/www.iau.org/iau0603/index.html

Answer 7

because its orbit is eccentric, the orbit is slanted relative to the horizontal plane of the othe rplanet's orbit, SIZE IS NOT THE FACTOR IN DEMOTING IT

also it is because part of pluto orbit resides in the Kuiper belt so technically, pluto is part of the many objects out there. also it is because Pluto crosses Neptunes orbit and to be a planet, the orbit must be clear of all other celestial objects.

Answer 8

because if you're going to call pluto a planet, there are plenty of other objects about the same distance, some even bigger, that would need to be called planets.

Answer 9

pluto is not going to be a planet because its size is more like a giant cold moon.

Answer 10

Who is pluto? is he movie star.