Understanding and Members of the Solar System

We live on earth so big, but there is something bigger than earth. So it can be said that we are only a small part of a universe system. The system where the earth is located is known as the solar system.

The solar system itself does not stand alone. Many celestial bodies in it. More about the solar system we will discuss further below. The focus of this discussion is about understanding the solar system and members of the solar system.

Chapter List 


The solar system is a collection of celestial bodies consisting of large stars namely the sun and all objects that are bound by the gravity of the sun. such celestial bodies include 8 planets, comets, asteroids and meteroids.

There are several theories that explain the formation of the solar system (solar system). Some of the theories you can read in article  6 Theory of Solar System Formation and Its Explanation . There have been described 6 theories of the formation of the solar system.


The solar system consists of celestial bodies namely the sun as the axis of the solar system, 8 planets orbiting the sun, asteroids, comets and meteoroids. Check out the explanation of each member of the solar system below.

1 # Sun.

The name of the sun is certainly familiar to us, right? The sun is one type of star, like other stars scattered in the universe. It’s just that the location of the sun is the closest to where we live, namely the earth. That is why, the sun looks much bigger than other stars in the universe.

Not only that, the sun is also the center of the solar system of planets which includes planet Earth. That is why, the sun is very influential on the life of living things on earth. In fact, almost all the energy needed by living things on this earth also comes from the sun.

Energy from the sun is indeed very large. Albert Einstein stated that the sun’s energy came from the results of the core reactions that occur in the sun’s body itself. This core reaction results in high solar temperatures. The surface temperature of the sun itself reaches ± 6,000 o C, while the temperature at the core of the sun, reaches millions of degrees Celsius. Very hot.

The sun’s body consists of two parts, namely in the form of the core and the outer shell of the sun. At the core of the sun, the shape is a ball of gas that has a very high pressure and temperature, which is 15 million 0 K. While in the outer shell of the sun, it still consists of three layers, namely in the form of photospheres, chromosomes, and corona.

To be clearer, more detailed information about the sun will be discussed in the article understanding and layers of the sun.

2 # Planet

Up to now, there are 8 solar escorting planets. The planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Please note, that before 2006, there was Pluto which is still considered a planet, so there are 9 sunny planets. However, in 2006, Pluto was no longer considered as a planet. Pluto was designated a non-planet by the International Astronomical Union (IAU), precisely on August 24, 2006.

Regarding these planets, here are the data on solar planets, complete with data on plant distances from the sun, the period of planetary revolution, the period of planetary rotation, and the number of satellites accompanying the planet.

Here are information about each of the solar escorting planets.

2 # 1 Mercury

Mercury is the planet closest to the sun. Mercury’s distance from the sun is only about 58 million km. The planet has a diameter of around 4,800 km, with a rotation period of 88 days. While the mercury revolution period is 0.24 years (sidereal revolution).

Mercury’s planet mass is only 0.0045 Earth’s mass, or arguably is very small. Because it is so close to the sun, this makes Mercury’s temperature very high, reaching 340 0 C (average). Therefore, even on this planet life is not found.

2 # 2 Venus

Venus distance to earth is about 42 million km or 0.28 AU (astronomical unit). The planet Venus has a diameter of about 12,200 km. Planet Venus is often referred to as “the morning star” because it often appears in the morning, when other stars are no longer visible.

In addition, Venus is also dubbed the evening star (the evening star). Why is that? Because this plant is already visible at dusk or evening from the earth, when the stars in the universe are not yet visible. On planet Venus also no life is found.

2 # 3 Earth

Earth is a planet that must be very familiar with us. Earth’s distance from the sun is ± 150 million km, with the furthest distance around 152.5 million km. For the value of one astronomical unit or 1 astronomical unit of the earth, the distance of the earth to the sun is calculated at 150.10 6 km or 150 million km.

The radius of the planet Earth is 6,370 km, with the rotation of the earth is 24 hours. Earth cider revolution is 1 year or 365 days. Earth’s average temperature is around 10 0  C. Planet Earth has a number of satellites called the moon.

There are so many explanations about the earth. However, more about the rotation and revolution of the earth has been discussed in article 3 kinds of earth movements: rotation, revolution and precession .

2 # 4 Mars

The distance from Mars to the Sun is ± 228 million km or 1.5 AU. The diameter of the planet Mars is 6,800 km, with a rotation period of Mars 24 hours 36 minutes (24 h 36 m ), while the duration of the cider revolution is 1.88 years or almost 23 months (687 days).

On this planet Mars also found the change of seasons, as happened on earth. In the polar region of Mars, it also appears covered by ice. However, the atmosphere that Mars has is so thin that there is less protection against what is on the surface of Mars. When in opposition, Mars appears as a red star when viewed from the earth. Mars also has two satellites, called phobos and deimos.

2 # 5 Jupiter

Jupiter is a planet that is referred to as the largest among the other planets of the members of the existing solar system. The distance from Mars to the Sun is about 778 million km, with a diameter of about 140,000 km. Jupiter’s planetary rotation and revolution are 9.9 hours and 11.86 years, respectively.

The rotation of this planet which is only about 10 hours only makes the equatorial movement of Jupiter very fast. Planet Jupiter also has an atmosphere, but the movement is very slow. Planet Jupiter also has a number of 14 satellites.

2 # 6 Saturn

Saturn is a very interesting planet so many also attract the attention of experts, astronomy. The uniqueness of this planet is having 3 rings. Saturn’s distance from the sun is about 1,430 million km or about 9.5 AU, with a diameter of around 120,000 km. Saturn’s rotation lasted only 10.2 hours, with a revolution lasting 29.46 years (30 years). This planet has 10 satellites.

2 # 7 Uranus

Uranus is a planet that has a great distance from the sun, which is about 2,880 million km. Because of its great distance, the planet’s temperature is very cold, which is -185 0 C. The diameter of the planet Uranus is about 50,000 km, with a rotation time of 10.7 hours (11 hours) and a revolutionary time of 84 years (cider revolution).

Planet Uranus has 5 satellites, namely miranda, titania, ariel, oberon, and umbriel.

2 # 8 Neptune

Neptune’s distance from the sun is very far. In fact, Neptune is the farthest planet from the sun. Neptune distance from the sun is around 4,500 million km or 30.10 AU. Neptune has a planet diameter of around 48,000 km, with rotation lasting 15.8 hours (16 hours), while its sidereal revolution is very long, that is, for 164.18 years. Neptune has 2 satellites, namely triton and nereid.

3 # Asteroid

Asteroids are small planets which are numerous in number and circulate in their orbits. This asteroid orbit is between the orbits of Mars and Jupiter. Asteroids have a very large volume, with the smallest volume having a diameter of about 1 km, and most asteroid diameters have a large size of the moon. The largest asteroid, called ceres, has a diameter of 480 miles and circulates around the sun in about 4.5 years.

4 # Comet

Comets are also referred to as tailed stars. Why is that? Because this planet looks like a shining star, but there is a tail attached to the star. When the planet is always circulating the ecliptic, it is different from comets that circulate around the sun with parabolic or hyperbole trajectories.

A comet consists of two main parts, namely the head and tail. The comet’s head section consists of a comet core, which is in the form of comet material and looks very bright and bright. The second part of the comet, called a comma in the form of a nuclear envelope. For more details about the parts and types of comets please read the article section on comets and their types .

5 # Meteoroid, Meteor and Meteorite

In this universe there are also objects that are so heavy, namely weighing up to several milligrams even up to several tons. It is called a meteoroid. This meteoroid hovers because it is influenced by the attraction of other celestial bodies. If a meteorite passes near the earth, then this object will be affected by the attraction of the earth.

However, before a meteoroid falls to earth, the meteoroid will rub against the atmosphere first, the friction takes place very quickly (10 – 70 km / sec). As a result of this friction, the meteorite caught fire. Meteoroids that are in a state of burning will appear brightly lit. Well, this brightly lit meteoroid alias is often called a meteor.

Meteors which are burned by the earth’s atmosphere are sometimes not fully burned. Sometimes, there are still remnants of meteors that can reach the earth. Well, the rest of this meteor is called a meteorite.

Thus the discussion about the understanding of the solar system and members of the solar system. Hopefully this explanation can help all of you. If you have questions or misinformation don’t hesitate to leave a comment below. Have a good study.


by Abdullah Sam
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