2023-08-24 02:38:55
17th anniversary of ‘Pluto’ being reduced to mere status. ‘Dwarf planets’ become former planets in the solar system Since the International Astronomical Union redefined the term “planet” and Pluto’s status was not questioned, the third definition of a planet was known. “Pluto” “Percival Lowell” American astronomer noted that the movement of Neptune and Uranus disturbed by other planets which he assumed might be a large planet He searched for the planet for 11 years, finding nothing until his death in 1916. Later in 1929, the Lowell Observatory Founded by Percival Lowell, Clyde Tombaugh began his search for a mysterious planet again. It took Clyde Tombaugh a little over a year with a 33-centimeter telescope and a blinking calibrator. Until the discovery of a new planet on February 18, 1929, and the discovery of the ninth planet of the solar system was announced on March 13, 1929. May 1, 1930 announced the name “Pluto” as a name. Officially, “Pluto” came from the offer of “Venetia Bernay”, an Oxford girl. Pluto is the name of the invisible Roman god of the underworld. Another good reason this name was chosen is that The first two letters of Pluto’s name, P-L, correspond to the initials of Lowell’s first and last name. In honor of this important astronomer, Pluto has a mass of only 0.07 times the mass of all other objects in the region. The atmosphere is more than 300 km thick, while Earth’s atmosphere is only 40 km thick. Pluto’s spin is 120 degrees while Earth’s axis is tilted 23.5 degrees. this And the fact that Pluto’s axis is tilted so much In 2006, the International Astronomical Union (IAU) established a definition of “planet” in Prague. There are three main points for an object to be called a planet. As follows, planets in the solar system are celestial bodies where:1. The object must orbit the Sun2. The object must have enough mass to maintain its spherical shape by its own gravity. especially The object’s gravity should keep it in hydrostatic equilibrium.3. The object must not have any other objects in its vicinity, thus making “Pluto” not meet the third definition. Because it has a mass of only 0.07 times the mass of other bodies in the same region, which is very small compared to other stars in the solar system. And from the results of the vote on Thursday, August 24, 2006, “Pluto” was removed from being a planet. It was placed in the group of dwarf planets (dwarf planet). Thank you.
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