Egyptian Revolution 2011 Essay

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Pluto, named after the Roman God of the Underworld, was discovered for the first time by Clyde W. Tombaugh in 1930. Since then, rigorous studies and photographic plate comparisons have been done for about one year, which led to the designation of Pluto as a planet. That is why, many of us grew up with the textbook lessons that our solar system comprised of nine planets, namely, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Of these, Pluto was the farthest and smallest planet of the solar system. For many decades, astronomers were unsure regarding the mass of Pluto. Consequently, there was no doubt about Pluto as a planet till 1978. In that year, astronomer James Christy discovered that this small planet has a moon (known as Charon), whose diameter is predicted to be half of Pluto. But, what led to the breakthrough that Pluto is not a planet? This article throws lights on why is Pluto not a planet . Why is Pluto Not a Planet Anymore? It is true that Pluto is no longer a planet, but it is categorized under the dwarf planet. This is because, Pluto fails to meet the specific requirements of being a planet. A dwarf planet is defined as any spherical object that fails to clear its neighborhood around its orbit. And for an object to be called a planet, it needs to meet certain characteristic features; it should orbit the sun, should be large enough and have sufficient center of gravity to become spherical, and last but not the least, it should be a dominating body in its orbit. Though Pluto revolves around the sun, it is very small and does not clear its orbit. Know more on facts about dwarf planets. The identification of Charon is like a milestone in the field of astronomy. With the discovery of Charon that orbits Pluto, astronomers succeeded in determining the actual mass of Pluto. Unlike other planets whose size is much bigger

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