As we all know, there are only eight known planets in the solar system: Mercury, Venus, earth, Mars, Jupiter, Saturn, Neptune and Uranus.
But you know what? Once upon a time, there were nine planets in the solar system. Because of the wrong estimate at that time, Pluto was also listed as one of them.
Introduction to Pluto
Pluto is a dwarf planet in the Kuiper belt and the first Kuiper belt object to be discovered. Pluto is the largest and second largest dwarf planet known in the solar system.
In 1930, Clyde Tombaugh discovered Pluto and regarded it as the ninth planet. But after scientists studied it and redefined the concept of planet, Pluto was “kicked out” of the nine planets.
American researchers have spent a long time exploring Pluto, and believe that Pluto and the legendary “Pluto” have a lot in common.
Where can I tell? Pluto is as cold and dark as the imaginary underworld. Although scientists are not sure about its structure, according to its average density, Pluto is composed of 70% rock and 30% ice water.
The bright part of Pluto’s surface may be covered by some solid nitrogen and a small amount of solid methane and carbon monoxide, while the composition of the dark part is unknown, which may be photochemical reactions caused by some basic organic matter or cosmic rays.
In addition, Pluto’s surface temperature is as low as – 200 degrees, which is extremely cold.
Scientists also found that it takes about 248 years for Pluto to to orbit the sun.
That means one year in the underworld is 248 years on earth. Some scientists also believe that there is a channel in Pluto through which people will enter a certain space when they die. In other words, this passage is the entrance to the underworld.
Pluto is an indispensable part of the solar system, is a very magical planet. So far, people have just unveiled the first layer of Pluto, and the idea of Pluto’s entrance is still only speculation.
But with the progress of science and technology, we will find the answer in the future! What do you think? Welcome to leave a message in the comments area.