On August 24, 2006, the 26th Conference of the International Astronomical Federation held in Prague, Czech Republic, adopted a resolution to no longer classify the disputed status of Pluto as a planet in the solar system, thus reducing the number of planets in the solar system from the traditional nine to eight. According to the resolution of the conference, the new definition of planets in the solar system included Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, Pluto was classified as a planet in the solar system, thus reducing the number of planets in the solar system from the traditional nine to eight. 2,500 astronomers from 75 countries participated in the current International Astronomical Federation. He said that before this, astronomers have proposed to reaffirm the status of Pluto, Saturn and Neptune,