The Solar System Planets

The Solar System Planets

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There are eight classic planets of the Solar System. In order of distance from the sun, they are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

From the technological advances that allowed the observation of the sky with optical instruments such as telescopes, telescopes and others, astronomers have been getting more and more accurate information about the planets and their satellites. Let us know a little about each of these eight planets of the Solar System.


It is the planet closest to the sun and the smallest in the solar system. It is rocky, practically without atmosphere, and its temperature varies greatly, reaching over 400ºC, on the sun-facing side, and about 180ºC, on the opposite side.

Mercury has no satellite. It is the planet that has a higher translational movement (the Mercurian year is only 88 days). The surface's appearance is similar to that of our crater-covered moon from the collision with celestial bodies.


Venus is known as Dalva star or Afternoon Star because of its brightness and also because it is visible at dawn and dusk, depending on the time of year (but remember that it is a planet and not a star).

It is the second closest planet to the sun and the closest planet to the earth. The intriguing questions posed by this "twin" planet of the earth begin with its own spinning motion. A complete rotation on itself takes 243.01 days, which is an unusually long period. Moreover, while most planets rotate about themselves in the same direction, Venus is one of the exceptions. Like Uranus and Pluto, their rotation is retrograde, which means that on Venus the sun rises to the west and sets to the east.

Venus is a planet very similar to Earth in size, density, and the force of gravity on the surface, and it has even been speculated as to whether it would be favorable to life. Moreover, their structures are very similar: an iron core, a rocky mantle and a crust. Today we know that, despite having very similar origins to Earth, its closer proximity to the Sun has led to the planet developing an extremely hostile climate to life.

In fact, Venus it's the hottest planet in the solar system, it is even warmer than Mercury, which is closer to the sun. Its average surface temperature is 460 ° C due to the large greenhouse effect that happens on a large scale across the planet and has no water.


It is the third closest planet to the sun. It is rocky and its atmosphere is composed of different types of gases, and its average temperature is approximately 15ºC.

The Earth, as far as we know, is the only planet in the Solar System that has conditions that make possible the existence of living beings as we know them. It has a satellite, the moon.


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