Pluto was once known as the ninth planet in the solar system. Its discovery in 1930 opened a new chapter in space science. For 70 years, Pluto was considered the symbol of the outermost boundary of the solar system. But in August 2006, the International Astronomical Union made a historic decision that resulted in Pluto losing its planetary status. It was reclassified as a 'dwarf planet'.
-Pluto was once known as the ninth planet in the solar system.
The first official definition of a planet was set at that conference in Prague, the capital of the Czech Republic. Scientists said that for an object to be recognized as a planet, it must meet three conditions—it must orbit the Sun, be nearly spherical in shape due to its own gravity, and be able to exert gravitational influence over all objects in its orbit.
Pluto meets the first two conditions, but fails the third condition. Because it cannot exert gravitational influence on other objects in its orbit.
According to scientists, Pluto is located outside the Sun in the Kuiper Belt region. There is a crowd of small objects containing ice and rock. Pluto's mass is much less than other objects in its orbit, so it cannot exert exclusive influence in that region. For example, Earth has established gravitational control over almost all objects in its orbit, but Pluto could not.
Cosmic objects that meet the first two conditions but fail to fulfill the third condition are called 'dwarf planets'. Currently, Pluto, along with Eris, Ceres, Haumea, and Makemake, are in this category.
This classification has made astronomy more precise and has made it easier to understand the structure of the solar system. Although Pluto is no longer a full-fledged planet, it is still considered a very important dwarf planet in the study of astronomers.
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