Prompt post #10- Recognizing truth: Why do human beings kick Pluto out of solar system?

By Guangyao Q

Human beings considered Pluto as a member of the solar system because we thought the Pluto was the end of the solar system, until IAU, International Astronomical Union, voted in 2006. Under the vote, there were accumulations of the new scientific discovers.

"NINTH PLANET"

Scientists seriously, wrongly overestimated the mass and the volume of Pluto and seriously, wrongly underestimated the mass and the volume of the astrodynamics, which were around the orbit of the Pluto. Before 1992, we did not discover the Kuiper belt, which is a circumstellar disc in the solar system beyond the planets, extending from the orbit of Neptune (at 30 Astronomical Units) to approximately 50 Astronomical Units. Now, we clearly know that Kuiper Belt is larger than asteroid belt- 20 times as wide and 200 times as massive. It is possible that there are astrodynamics, which have similar size of Pluto. Follow the development of the definition of a planet, a planet has "cleared the neighborhood" of its own orbit, but Pluto does not have the ability, "cleared the neighborhood", because of the limitation of its mass and volume. Finally, we discover Pluto is just a astrodynamics,  which is just a little bit large in the Kuiper belt, and is very different form the eight Planets.

Kuiper belt

So many accumulations of the new discovers led IAU to cancel the position of "NINE PLANET", and it was also the climax of the science. It teaches me that the road of discovery of the world is endless.

Stay foolish; keep searching.

Thanks for reading.



Reference:
http://solarviews.com/eng/kuiper.htm
https://en.wikipedia.org/wiki/Clearing_the_neighbourhood
https://en.wikipedia.org/wiki/Kuiper_belt