Why Is Pluto No Longer a Planet?

why is pluto no longer a planet

The question of why is Pluto no longer a planet has always been a source of controversy, especially when it comes to its classification. When it was discovered in the 1930s, Pluto was deemed a planet, even though it was not a true planet. At that time, there were no rules for identifying planets, and the definition of a planet was more ambiguous. According to astronomers, the definition of a planet is an object that orbits the Sun, with a mass large enough to make it spherical under gravity. Also, the object must have cleared its orbit.

The reclassification of Pluto is a significant milestone in science, and it will require the rewriting of textbooks and the replacement of wall charts. It also demonstrates the value of scientific research, as new evidence is often presented that overturns accepted theories, leading to an improved understanding of the universe. Although many people still hold a sentimental attachment to Pluto, the news will surely disappoint them. Even if they have a personal opinion about Pluto, it’s worth remembering that this isn’t the first time that Pluto has been demoted.

The IAU recently revised the definition of planets and decided that a celestial body can only be a planet if it orbits the sun, has a moon, and clears its neighborhood. But Pluto failed to meet these criteria, as its orbit overlaps with Neptune. That’s one of the reasons why Pluto is no longer a planet: its orbit is too eccentric for it to be considered a true planet.