What is the order of the planets of the solar system?

Have you always been fascinated by the planets of the solar system? It is one thing to read facts in science books and it is another to know how to retain them. Every planet, including planet Earth, evolves in the solar system. We are looking for you on the planets of the solar system and their order in space.

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Plan of the article

  • Planets: How many are there?
  • Planet: the exact definition
  • The 8 planets of the solar system: and Pluto, then?
  • Retaining the order of planets of the solar system
  • Playing with memory and planets

The planets: how many are there?

Within our solar system, we currently know 8 planets . A few years ago, Pluto was considered a planet. It was relegated in 2006 to the rank of minor object, or dwarf planet in the solar system.

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No more books that teach us that there are 9 planets in the solar system: there are 8 planets. To fully understand the solar system, it is necessary first of all to revise the definition of a planet . Do you know what a planet is?

Planet: the exact definition

A planet, as we know them in the solar system, is a mass, a star that meets exactly 3 criteria. A planet must be in orbit around the sun which means it must revolve around the sun. If we take the example of the Moon, we can therefore say that it is not a planet, since this mass revolves not around the sun but on the Earth.

A planet also responds to a form. It must be round to be called a planet, and more particularly spherical . A planet is a mass that contains a huge amount of matter. This material allows it to have a gravitational force, which makes it spherical.

Finally, to enter the very closed club of planets, the sphere must have a large mass that attracts smaller stars towards it. All the small celestial bodies that find themselves attracted into its orbit thus make the planet grow and enlarge.

The 8 planets of the solar system: and Pluto, then?

Pluto was still part of the planets of the solar system until 2006, when it was decided that it would no longer be part of the private club of planets. Pluto is considered too small in mass to appear in the ranks of the planets. It is now classified as a secondary celestial object, or dwarf planet.

By not exercising gravitational force strong enough, Pluto is not able to attract to her stars that are around her. It was found that more than 10,000 stars or asteroids gravitated around the sun.

Some of them are of greater mass than Pluto, which prompted the scientific community to review the ranking of planets in the solar system. This had not been done since 1930, the date of the discovery of Pluto. Pluto was at the time a new planet, it is now a little dwarf planet quite any.

Retaining the order of the planets of the solar system

So in the solar system, there are 8 planets. These have a very particular order in the system and this order is not easy to remember, especially if science and astrophysics are not your strong.

So, we came out for you ways Simple mnemonic techniques that consist of repeating well-known phrases in the profession:

MeVoilàToutMouillé, IsuiviUn uage”

In this sentence, you have the exact order of the planets, from the closest to the sun to the furthest from the sun, within the solar system.

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune .

This phrase is one of the many mnemonic phrases that can be invented to retain the order of the planets. If this phrase is too complicated for you or does not suit you, you are free to review the planets of the solar system and make yourself your own mnemonic phrase .

If you think you’re wrong between Mercury and Mars , remember that Mercury is closest to the sun… and think about mercury, the temperature rise.

Playing with memory and planets

Astrophysics and astronomy are very complex disciplines whose basics must be known at school. For a child, nothing like having with him a mobile representing the planets of the solar system. When playing, children often retain better what they need to learn.

Visualizing the planets of the solar system with shapes, colors, materials and names can help you learn and retain better.

Between the 8 planets, nothing more funny than finding your own mnemonic phrase. This allows the child to create his imagination while learning. Astronomy lovers will go much further than these simple tips and can find More elaborate tips to retain the planets of the solar system thanks to their colors or even their presupposed mass. It ‘sup to you to play with the planets of the solar system!

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