Exit the throne planet Pluto Implications.

<P> "International Year of Astronomy 2006 as the most important events of the world, Pluto out 'planets throne' marks the level of awareness of human improvement of the solar system." Expert of the planet, Purple Mountain Observatory, Chinese Academy of Sciences, said researchers thought the king. .</ P> <P> 2006 年 8 24, the ranks of planets out to Pluto, downgraded to a dwarf planet. .70 years, people familiar with nine planets in the solar system into eight major planets. .</ P> <P> Pluto Why step down? .Wang thought introduced, to step down for two reasons: first, in 1930 when Pluto was discovered, because it is very far from Earth, was miscalculated the size, that it is greater than the Earth, so named the planet Pluto. .Pluto's satellite in 1978 was found to measure the quality of Pluto than 1% of the Earth, then after further observation, that its diameter is only 2,300 km, less than the Earth 1 / 5; the second, more important reason is that .90 years from the date of the last century more than a decade of time, outside the orbit of Neptune that tens of thousands of small bodies, forming a Kuiper Belt, Pluto is only one of the first to be discovered, and there is not the greatest. .All accounts, the planet Pluto and other traditional objects clearly not a class, but the representation of the Kuiper Belt objects. .</ P> <P> 2006 年 8 24, the International Astronomical Union 26th General Assembly voted to determine the planet's exact standards and define downgraded to dwarf planet Pluto, and one of them as TNOs .Star family of signs. .</ P> <P> the General Assembly of the planetary status of Pluto, the resolution standards and what inspired him to people? .Wang thought that the first lesson is that human understanding of the solar system is deepening, along with raising the level of human technology, human beings have the definition of a planet based on modern scientific basis of the exact; The second lesson is to step down reflects Pluto .understanding of the human solar system now enriched than 40 years ago. .Since the 20th century, 60 years, with new and powerful ground-based telescopes into observation, spacecraft and human space exploration to the moon, the 40 years, the human knowledge of the solar system objects to increase more than 60 years before the 20th century, a few .the sum of the knowledge millennium, thus promoting new standards and new concepts of production. .</ P> <P> clear that the king thought, from a scientific point of view, exit planet "throne" of the newly discovered Pluto in 1930 when compared with the more important, because Pluto is a Kuiper Belt's "leaders" is the Kuiper .the most studied objects zone samples and the discovery of the Kuiper Belt structure of the human understanding of the solar system a qualitative leap, far more than one planet discovery. .</ P> </ p>.