why is pluto eliminated from list of planets?

Answer 1

Pluto is eliminated from the list of planets because it is a KBO (Kuiper Belt Object). KBO is a belt of asteroids beyond Neptune. The reason why Pluto is considered a KBO because Mercury, Venus, Earth & Mars are rocky planets and Jupiter, Saturn, Uranus & Neptune are gaseous, but Pluto is rocky & icy. Another reason is that Pluto's moon Charon is half the size of Pluto. So, scientists consider that Pluto is the biggest KBO & Charon is another KBO trapped under Pluto's garvity.

Answer 2

Pluto, the last planet to join the heavenly pantheon, became the first to leave it. The status of Pluto had been under discussion for some time, but with the discovery of 2003 UB313, nicknamed Xena, the question became acute, for it seemingly had as much right as Pluto to be called a planet.

On August 24, 2006, the International Astronomical Union surprised the world by voting in a new definition of planet, one that would exclude Pluto and bring the total number down to eight. (There had previously been been strong speculation that the redefinition would bring the total up to 12 instead of down.)

Pluto was instead classified as a dwarf planet, along with Ceres and the aforementioned Xena. The main difference between a dwarf planet and the real thing is that the dwarf variety has not cleared the area of its orbital path.

This redefinition met with a wave of protests from those who wanted to see the ninth planet grandfathered in, including but not limited to supporters of the late Clyde Tombaugh, who discovered Pluto in 1930. His widow, however, said he would have been accepting of the IAU's decision since "he was a scientist" and understood that astronomers had to take into account newly discovered objects in the Kuiper Belt (where Pluto is located).

Answer 3

Pluto use to be a planet but they took it off the list this year. A set of strict guidelines are now used to identify a planet.
They are:
1. The object must be in orbit around the Sun.
2. The object must be massive enough to be a sphere by its own gravitational force.
3. It must have cleared the neighborhood around its orbit.

Pluto fails to meet the third condition
The guildlines were put in place by the International Astronomical Union (I.A.U.) in 2006

Answer 4

Wikipedia says: "initially categorised as a planet, Pluto is now seen the biggest member of a particular inhabitants conventional simply by fact the Kuiper belt." It additionally says that "fairly some scientists proceed to hold that Pluto could desire to be categorised as a planet." "interior the previous due Nineteen Seventies, following the invention of teenybopper planet 2060 Chiron interior the outer photograph voltaic gadget and the popularity of Pluto's extremely low mass, its status as a significant planet began to be puzzled. interior the previous due twentieth and early twenty first century, many products equivalent to Pluto have been got here upon interior the outer photograph voltaic gadget, particularly the scattered disc merchandise Eris in 2005, it extremely is 27% greater great than Pluto. On August 24, 2006, the worldwide Astronomical Union (IAU) defined what it skill to be a "planet" in the photograph voltaic gadget. This definition excluded Pluto as a planet."

Answer 5

According to the new definition, a full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit.

Pluto has been demoted because it does not dominate its neighborhood. Charon, its large "moon," is only about half the size of Pluto, while all the true planets are far larger than their moons.

Answer 6

Cause we used tothink pluto was by itself. And then we realized that pluto is just one rock amoung a million other rocks orbiting the sun at that distance. plus pluto is so small, you could put it ontop of the US , ands till see the east coast and west coast from space. Its a rock, not a planet.

Answer 7

because a bunch of peope that call themselves the Academics decided it was a to small to be a planet, and an Asteriod in orbit around our solar system, But I think they are stupid and don't realy frickin know their buttholes from a hole in the ground. You can't just up and change because you think so, find proof then change it

Answer 8

Pluto had sex before marriage. That's a no-no among respectable planet families.

Answer 9

Because it does not fit in the definition of the planets now.

Answer 10

because they decided its more of an astroide orbiting the sun rather than a full blown planet.