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The number of planets in the solar system - does it really matter how much?

And whether the changes in the definitions of the planets were essential and how much their contribution affects the space sciences

The new solar system
The new solar system

Astronomers who are members of the International Astronomical Union (IAU) recently gathered in Prague and after heated discussions it was decided to redefine the definitions concerning the various bodies in the solar system. The definition of "planet" was updated, a new definition of "dwarf planet" was added and all those bodies that do not meet these two definitions were defined as "small bodies in the solar system".

Needless to say, there were many opponents of the decision, but the question is: what did it contribute? In a world where there are only 8 planets and another 3 dwarf planets it is not a different world, what has changed is the great interest that this strange debate has aroused in the whole world. Great attention was directed to the subject of space and exposed many people to the fascinating world of astronomy and the study of the solar system, suddenly ordinary people become interested and curiosity is at its peak.

As far as the World Astronomical Union is concerned, August 2006 will be remembered as a turning point - finally, the researchers sorted out the maze of discoveries discovered in the last decades, and Pluto, which since 1930 was considered the ninth planet, was demoted because it simply did not belong. A similar thing happened two hundred years ago, when in 1801 astronomers discovered the asteroid Ceres, which resides in the asteroid belt between Mars and Jupiter, it was defined together with the large asteroids Pallas, Vesta and Juno as planets. Over the years, and the continued research of that region, the researchers discovered that that region contains bodies whose existence was previously unknown - something that sparked a discussion on the question of the status of the large asteroids as asteroids and their status was denied. Since the year 1930, when Pluto was discovered, it has been considered a planet, but in 2003, with the discovery of the celestial body Eris in the Kuiper Belt (which is larger than Pluto), a debate once again arose as to whether we had discovered another planet (the tenth in number) or whether Pluto is not a planet at all . This time too, like two hundred years ago, it was decided not to give Pluto the status of a planet since there are many similar objects in that region of the solar system that have not yet been discovered.

The processes of discussions and brainstorming are healthy for any academic community and the various researchers, these turning points are very important for science, and from time to time such discussions should be stimulated for the sake of progress.

12 תגובות

  1. Yes, it matters because I do a crossword on planets and I was wrong because I thought there were nine and it was a mistake because I also calculated Pluto but now it is considered a dwarf planet, the worst thing I did was with a pen and it is not easy at all to change the words nor the squares
    And I probably didn't sleep well that day because I always check with it if what I think is true, in short I was lazy because of the lack of sleep.

  2. There are 8 and to hell with you!! Hema, Nega, Cdhua, Mars, Jupiter, Saturn, Uranus and Neptune.
    In 2006 they decided to consider Pluto a dwarf planet unlike the rest.

  3. The halachites reflect light from the sun. Just like the moon…
    The moon is not visible at the beginning of a Hebrew month. And it is full in the middle of the Hebrew month.

  4. And I have another question, on which date of the month do you not see the moon at all?

  5. Why is the writing so big, you don't understand that you understand it even without the big writing!!!!!!!!!!!!!!!!

  6. Additional aspects beyond the effect on the gravitational forces in the immediate environment can be the subtraction of the area from matter/mass, and even the creation of a new cloud in the area, fragments, etc.

    Total system collapse is an unlikely scenario, although it is possible. A planet the size of a "Humper" would not cause a system collapse but if Jupiter or Saturn disappeared or exploded, the entire solar system would feel the changes.

    Regarding the effect on nearby systems, in my opinion, (and I qualify my words - this is just my opinion), this will have no effect in the short term, and perhaps a minimal effect in the longer term.

    The "planets" are too small to have an effect on nearby systems. But if a "star" (like the sun) explodes, the impact will be much greater on the environment.

  7. Questions for Remi:
    What are the other aspects that affect?
    And can it cause the entire system to crash?
    Could the collapse of the solar system affect nearby systems in the Milky Way galaxy in the same way?

  8. Answer to Edna:

    Of course there is an effect, there is a system of balances and brakes that has been built up over millions of years. Take for example the changes in the gravity of one planet that affects another planet, then remove one of them from the equation, this will affect the entire orbit of the other planet and in turn will affect the orbit of the other bodies in the area.

    Of course, besides this aspect, there are other aspects that influence.

  9. Is there any effect on the solar system when one of the planets explodes or disappears for some reason?

  10. The size of "Cres" is about 1/3 {945} km, the moon is 3 times bigger than it. After 2 decades, Mars will become our springboard to the asteroids and Jupiter and from there further because if we don't move to another planet then the human water race will become extinct due to the danger of asteroids and over-exclusion infection diseases.

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