INSIDEN24.COM – The nursery rhyme now sings the verse that there are 8 planets in the Solar System.
Maybe many of us remember the lessons from elementary school before 2006 that there are 9 planets in the Solar System and Pluto is one of them.
But now Pluto is no longer considered a planet, why is that?.
Pluto was discovered on February 18, 1930 by one of the astronomers that he managed to find the 9th planet in our Solar System after Planet Neptune.
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So that the Sailormoon film was created with all the cartoon characters named with the names of the planets in them including Pluto so that children could memorize the names of the planets. As time goes by, Pluto is no longer called a planet.
Pluto in our Solar System is indeed very small in size, but the astronauts at that time were very sure that at that time Pluto was the 9th planet in our Solar System.
The name Pluto comes from the name of the Greek god The Underworld. Pluto is indeed very small for the size of a planet, the diameter of Pluto is 2376.6 km, even smaller than Mercury.
Then this problem arose when a more sophisticated telescope called Hubble was successfully developed at that time.
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From observations we know that Pluto is just one of the many celestial objects in the Kuiper Belt area, in the Kuiper Belt area there are 7,000 celestial objects like Pluto.
One of the celestial objects is Eris, whose size is larger than Pluto, which makes Pluto’s status as a planet questionable.
The large number of celestial objects out there made astronomers finally make conditions for celestial objects you could say planets, there are 3 conditions, namely:
1. The planet must orbit the sun
