why is pluto not a part of solar system?

Answer 1

pluto is still apart of the solar system. 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.

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.

(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".


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

Answer 2

According to the new rules a planet meet three criteria:
1) it must orbit the Sun,
2) it must be big enough for gravity to squash it into a round ball, and
3) it must have cleared other things out of the way in its orbital neighborhood.

The latter measure knocks out Pluto and Xena, which orbit among the icy wrecks of the Kuiper Belt, and Ceres, which is in the asteroid belt.

It has long been clear that Pluto, discovered in 1930, stood apart from the previously discovered planets.

Not only was it much smaller than them, only about 1,600 miles in diameter, smaller than the Moon, but its elongated orbit is tilted with respect to the other planets and it goes inside the orbit of Neptune part of its 248-year journey around the Sun.

Hence Pluto is no longer considered a planet but last week Pluto was demoted to the status of a “dwarf planet.”
However, please note, it is still part of the solar system.

Answer 3

it IS a part of the solar system. it is NOT considered a planet because it does not meet the following qualifications:
The 2006 redefinition of "planet" by the International Astronomical Union (IAU) states that, in the solar system, a planet is an celestial body that:

is in orbit around the Sun,
has sufficient mass so that it assumes a hydrostatic equilibrium (nearly round) shape, and
has "cleared the neighborhood" around its orbit.
A non-satellite body fulfilling only the first two of these criteria is classified as a "dwarf planet", whilst a non-satellite body fulfilling only the first criterion is termed a "small solar system body" (SSSB). The redefinition has been criticized and remains controversial.

According to the definition there are currently eight planets and three dwarf planets known in the solar system. The definition does not apply outside the solar system, and so does not include provision for extrasolar planets.

Answer 4

Pluto is still a part of the solar system, as well as all the other so called dwarf planets, pluto is now said to be ...

Answer 5

Pluto is still a part of the solar system, but as what the earlier answers tell you, it is not just considered as a planet

Answer 6

You see Pluto was actually a planet but it has been classified into a 'Dwarf Planet' as it cuts into Neptune's own Solar Orbit. Each planet has its own Solar Orbit and it should not cut into anothr planet's solar orbit. But if its cut into the other planets solar orbit, it is no longer a planet.I hope i have been able to enlighten you and other users who answer or just read this question,why is pluto not part of the solar orbit.Thank you for spending time reading about my answer for this question.

Answer 7

Its definately a part of the solar system even now. It is now being called a dwarf planet.

Answer 8

It is still a part of the solar system, it's just not a planet.

Answer 9

Who said it wasn't part of the solar system anymore? It's just not classified as a planet any more,, it is now,, at least for the time being,, a sub planet.

Answer 10

It is still part of the solar system, it has simply been reclassified as a dwarf planet.