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Anonymous users2024-02-07Pluto loses planetary status and becomes a "dwarf planet" - CCTV International.
22:34, 24 August 2006 **: Xinhua Prague, August 24 (Xinhua) -- Pluto, which has been at the end of the nine planets in the solar system for more than 70 years, has been controversial since its discovery.
After years of debate in the astronomical community and days of bickering at the current International Astronomical Union Congress, Pluto was finally "demoted" and expelled from the planetary family. From now on, this object at the edge of the solar system will only be called a "dwarf planet" along with some other "siblings" of about the same size. According to the new definition adopted by the General Assembly of the International Astronomical Union on the 24th, "planet" refers to a celestial body that orbits the sun, has its own gravity enough to overcome its rigid physical strength to make the celestial body spherical, and can clear other objects near its orbit.
According to the new definition, the planets of the solar system will include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, all of which were discovered before 1900. According to the new definition, a celestial body that also has sufficient mass and is spherical in shape, but cannot clear other objects in the vicinity of its orbit is called a "dwarf planet". Pluto is a dwarf planet.
Other objects orbiting the Sun that do not meet the above conditions are collectively referred to as "small bodies of the solar system".
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Anonymous users2024-02-06Pluto refers to Hades. Influenced by Western mythology and the use of many literary works, many people use Pluto as their screen name.
When choosing a screen name, most people think about showing their personality and being different, and they hope to choose a name that sounds good and has a deep meaning and impresses.
Pluto refers to Hades in Roman mythology, corresponding to Hades in Greek mythology. Because it is the god who is in charge of the underworld, Pluto is shrouded in a layer of mystery, which can arouse the reverie of others, and it looks cool, so many people use Pluto as their screen name.
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Anonymous users2024-02-05Because it is not as large as the moon in terms of volume, and there are no molecular absorption bands found in Pluto's spectrum, we believe that Pluto is completely different from the other large planets between Mars and Pluto Some speculate that it was once a moon of Neptune and only began to move in its own orbit around the Sun after escaping.
It is also closely related to whether Xena, another discovered in 2003, could become the tenth largest planet in the solar system. With a diameter of about 3,000 kilometers and a distance of about three times that between Pluto and the Sun, the status of the tenth planet of Xena cannot be recognized, then the doubts about Pluto's identity as the ninth planet will not stop. As the most massive and distant planet in the solar system, it has a diameter of only 2,360 kilometers, which is nearly 1 3 smaller than "Xena".
If "Xena" is rejected, then according to the unified standards of science, Pluto should also be swept away to be considered fair.
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Anonymous users2024-02-04Pluto is a planet, but it has been slandered by ignorant humans.
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Anonymous users2024-02-03Because the size is too small. It's about the same size as many satellites. So from the planet, downgraded to "asteroid".
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Anonymous users2024-02-02According to a resolution adopted by the International Astronomical Union on August 24, 2006, there are three main conditions for a celestial body to be called a planet.
1.The object must be in orbit around the Sun.
2.The object must have a mass large enough to overcome the solid stresses to achieve a hydrostatic equilibrium shape (nearly spherical).
3.The object must have cleared the area near its orbit.
Pluto, on the other hand, does not meet the third planetary criterion mentioned above.
The composition of Pluto is not yet known, but its density (about 2 grams per cubic centimeter) suggests that Pluto may have been made of 70 rocks and 30 ice water, like Triton. The bright part of the Earth's surface may be covered with some solid nitrogen and small amounts of solid methane and carbon monoxide, and the composition of the dark part of Pluto's surface is not yet known but may be some basic organic matter or a photochemical reaction triggered by cosmic rays. >>>More
After Pluto was discovered. Astronomers seem to have found a brother. Gleefully make it the ninth largest planet in the solar system. >>>More
The possibility is very small, Pluto is more than 5 billion kilometers away from the earth, if you want to fly there, you have to bring enough water and food, and there are billions of people around the world, if humans still exist after the expansion of the sun, it should be tens of billions, and how many large-scale spaceships will be needed to take so many people at once. And Pluto does not have any resources needed by human beings, even if it "moves", it will never go to Pluto, Pluto's gravitational pull is extremely small, there is almost no atmosphere, its surface temperature is more than minus 200 degrees Celsius, everyone can't live in a spaceship, and its year is equivalent to more than 200 Earth years, in addition, it seems to be about the same size as the moon, our spaceship may be bigger than it, and for Pluto, it also has a "huge" moon, Once streaked across Pluto's sky, it takes up most of the sky. So it's unlikely to move to Pluto.
Pluto is only one-third the size of the Moon, and weighs 470 times lighter than Earth, in addition to the discovery of Eris in 2015, the planet is about 27 heavier than Pluto, so in 2016, IAU (the abbreviation of the International Astronomical Union) officially defined the concept of planets, excluding Pluto from the planetary range and classifying it as a dwarf planet (Pluto-like body).