Harvard – Smithsonian Center for Astrophysics experts on September 18 debate on planet Pluto continued, there is an unofficial investigation concluded that most of the people or the planet Pluto recognized qualifications. Pluto is smaller solar system orbit near the outer objects, After a long period of time, the planet Pluto was classified as belonging to the nine planets of the solar system, a member of the family, due to the volume and quality even better than some of the planet Pluto satellite, in 2006 the International Astronomical Union was redefined a planet as a celestial body, after only eight major planets of the solar system. According to an unofficial voting statistics, in the public mind Pluto is still a planet, a member of the family, its planetary status has not been changed much, this Harvard – Smithsonian Center for Astrophysics experts to re-start discussing this topic.
In fact the Pluto’s size and radius is very small, the moon is much larger than Pluto, planet of the solar system as well as the number of satellites than Pluto large, precisely because of the volume and quality of Pluto is very small, so it was deprived of the planet qualifications. But Pluto may be small, and there are many satellites, satellites constitute a special group, so far, scientists discovered Pluto total around five natural satellites, the volume is smaller than Pluto, Pluto may also have debris ring, around Pluto also formed a miniature multi-satellite systems.
For scientists, the status of Pluto as a dwarf planet still, from Harvard University science historian Owen Gingerich think our awareness of a planet varies with time change, the initial specification for the stellar planets residual material around spherical objects formed, and later scientists believe the planet should have the ability to clean up the track, that is able to clean up the environment around the track itself, “clean”, the gravitational radius can rule a certain space, but Pluto does not comply with this, because in the near distance Pluto Kuiper belt near the still large number of volume and mass of objects, Pluto did not they clean up.
The birth and evolution of planets astronomers focus of the study is still, so far our planet definition and perspective is limited to the solar system, beyond the solar system, there are different types of planets, the planets of the solar system is not, scientists have discovered nearly 2000 exoplanets, this is just the tip of the iceberg galactic planetary world, there are more planets were not found. According to preliminary statistics scientists, every star in the Milky Way around the average over the presence of a planet. July 2015, NASA’s New Horizons spacecraft will fly to Pluto, then we will be more in-depth understanding of mysterious planet.