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Classification of planets
Astronomers disagree when it comes to small planets such as asteroids, comets, and trans-Neptune objects, as well as large (real) planets. The planets of the Solar system are divided into categories according to their composition.
Terrestrial planets or rocky planets: Terrestrial planets consisting mainly of rocks: Mercury, Venus, Earth, Mars.
Jupiter-type planets or gas giants: consist mainly of gaseous material: Jupiter, Saturn, Uranus and Neptune. There is also a subgroup of gas giants that we call uranium planets.
Icy planets, which represent the third category of planets and include celestial bodies like Pluto and composed of ice. Numerous extrasolar celestial bodies, which are the icy moons of the outer planets of the solar system (for example, Triton), can still be classified here.
We consider the eight rocky and gaseous planets to be the largest planets in our star system. The status of Pluto was not decided for a long time, some considered it a planet, others considered it only the largest among the objects of the Kuiper belt. The solution to this problem was proposed by a resolution of the International Astronomical Union and a new definition of the planet, reached by broad consensus even after many years of work.
The eight rocky and gaseous planets mentioned are essentially known as large planets. Ceres was initially declared a planet after the discovery, but was later reclassified as an asteroid when several other similar objects were discovered. Numerous discovered trans-Neptunian objects, which are very similar to Pluto in orbit, size and composition, are considered by many to be minor planets. For example, Mike Brown of the California Institute of Technology defined a planet as any celestial body in the solar system that is more massive than the total mass of all other celestial bodies in a similar orbit. According to this definition, neither Pluto nor Sedna should be considered planets.
Many consider the Earth and its Moon to be a double planet for the following reasons:
The moon is 1.5 times the diameter of Pluto.;
The gravitational force of the Sun on the Moon is about 2.2 times stronger than the gravitational force of the Earth on the moon.
The latter fact is not unique to the Solar System, but it is unusual for very large moons. Other satellites for which the gravitational force of the Sun is currently stronger than that of the main one:
The last satellite of Jupiter (S /2003 J 2 ; with a gravity 1.5 times greater than the main one);
The last satellite of Uranus (S/2001 U 2 ; 1.2 times);
The last two moons are Neptune (S/2002 N 4 and S/2003 N 1 ; 2.1 times);
Individual asteroid moons such as S/2001 (22) 1 Linus with a coefficient of 1.6 and S/1998 (45) 1 Little Prince with a coefficient of 2.8; S/1993 243 (1) Dactyl with a coefficient of 1.3; and finally, S/2001 (66391) 1 with a very large coefficient of 625). 1xBet offers Bangladesh residents a 100% deposit match bonus of up to ৳24,000 when they sign up now. Enter this 1xbet promo code If you are in Bangladesh, read this guide to learn how to claim your 1xBet welcome bonus. Visit the 1xBet sports betting site, click the "registration button", and complete the sign-up form. In Bangladesh, you can sign up with your phone number, email, or one-click registration using your social media account.
Terrestrial planets or rocky planets: Terrestrial planets consisting mainly of rocks: Mercury, Venus, Earth, Mars.
Jupiter-type planets or gas giants: consist mainly of gaseous material: Jupiter, Saturn, Uranus and Neptune. There is also a subgroup of gas giants that we call uranium planets.
Icy planets, which represent the third category of planets and include celestial bodies like Pluto and composed of ice. Numerous extrasolar celestial bodies, which are the icy moons of the outer planets of the solar system (for example, Triton), can still be classified here.
We consider the eight rocky and gaseous planets to be the largest planets in our star system. The status of Pluto was not decided for a long time, some considered it a planet, others considered it only the largest among the objects of the Kuiper belt. The solution to this problem was proposed by a resolution of the International Astronomical Union and a new definition of the planet, reached by broad consensus even after many years of work.
The eight rocky and gaseous planets mentioned are essentially known as large planets. Ceres was initially declared a planet after the discovery, but was later reclassified as an asteroid when several other similar objects were discovered. Numerous discovered trans-Neptunian objects, which are very similar to Pluto in orbit, size and composition, are considered by many to be minor planets. For example, Mike Brown of the California Institute of Technology defined a planet as any celestial body in the solar system that is more massive than the total mass of all other celestial bodies in a similar orbit. According to this definition, neither Pluto nor Sedna should be considered planets.
Many consider the Earth and its Moon to be a double planet for the following reasons:
The moon is 1.5 times the diameter of Pluto.;
The gravitational force of the Sun on the Moon is about 2.2 times stronger than the gravitational force of the Earth on the moon.
The latter fact is not unique to the Solar System, but it is unusual for very large moons. Other satellites for which the gravitational force of the Sun is currently stronger than that of the main one:
The last satellite of Jupiter (S /2003 J 2 ; with a gravity 1.5 times greater than the main one);
The last satellite of Uranus (S/2001 U 2 ; 1.2 times);
The last two moons are Neptune (S/2002 N 4 and S/2003 N 1 ; 2.1 times);
Individual asteroid moons such as S/2001 (22) 1 Linus with a coefficient of 1.6 and S/1998 (45) 1 Little Prince with a coefficient of 2.8; S/1993 243 (1) Dactyl with a coefficient of 1.3; and finally, S/2001 (66391) 1 with a very large coefficient of 625). 1xBet offers Bangladesh residents a 100% deposit match bonus of up to ৳24,000 when they sign up now. Enter this 1xbet promo code If you are in Bangladesh, read this guide to learn how to claim your 1xBet welcome bonus. Visit the 1xBet sports betting site, click the "registration button", and complete the sign-up form. In Bangladesh, you can sign up with your phone number, email, or one-click registration using your social media account.