Exploring the Rocky Planets of the Solar System

rocky planets

In our previous post, we studied the gaseous planets of the solar system (you can access this post by clicking here !), today we talk about rocky planets. We talk about four of the eight planets in the solar system.

To understand the characteristics of the other four missing planets, let’s study today about the rocky planets, studying their main features and exploring each of the planets, including Planet Earth!

Characteristics of rocky planets

First of all, let’s look at what are the main features of rocky planets, and how to differentiate them from gaseous planets. The rocky planets of the Solar System are also known as terrestrial planets, solid or even telluric planets.

The main difference between these planets and the gaseous planets is that the rocky ones are basically composed of rocks, thus presenting a higher density when compared to the gaseous ones.

Also related to the density of these planets can be explained their distance from the sun. Because they are denser planets, they tend to be closer to the sun, while lower density planets will be farther apart.

In addition, the rocky planets have their well-defined relief shapes. As we mentioned above, there are four rocky planets: Mercury, VenusEarth, and Mars. Let’s study each one below.


Mercury is the planet closest to the sun. In addition, it is also the smallest planet in the Solar System. Its surface, whose diameter is about 25% of the Earth’s diameter, is basically composed of large craters, as well as a large number of lava valleys.

Another important feature of this planet is its very high thermal amplitude, which reaches 600 ° C, making any known life form impossible today.


Venus, or also called Estrela D’Alv or Morning Star, has some very interesting facts. It is the closest planet to the Earth, the second most distant from the sun and the brightest planet in the solar system.

It bears great resemblance to the Earth in matters of size, chemical composition, and mass. What precludes the existence of life on Venus is its atmosphere, highly corrosive, and high in carbon dioxide.


The Earth has more than 4.5 billion years, and we do not talk about their relief conditions and geological structures, as you should already know!

In addition, it is the only Solar System Planet whose distance from the sun promotes the existence of water in the liquid state, reaching a temperature around 15 ° C.

As you already know, the Earth has only one natural satellite, which is the moon!


Mars is the last of the rocky planets, the fourth in the distance from the sun. It has an atmosphere with a high concentration of carbon dioxide, with average temperatures around -60 ° C. However, like Earth, Mars has four well-defined seasons, and it also has mountainous and plains on its surface.

Therefore, we study the four rocky planets and then understand the classification of the eight planets of the Solar System. The knowledge of this subject is very important for issues in geography, as well as the knowledge of what surrounds us!

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