Solar system

Rocky planets

Rocky planets

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The planets Rockies are the four innermost in the Solar System: Mercury, Venus, Earth and Mars.

They are called rocky or terrestrial because they have a compact rocky surface, like Earth's. Venus, Earth, and Mars have more or less significant atmospheres, while Mercury has almost no.

On these rocky planets there has been a very high selection of matter, giving rise to products such as uranium, thorium, and potassium, with unstable nuclei that accompany radioactive fission phenomena. These elements have developed enough heat to generate volcanism and important tectonic processes. Some are still active and have erased the features of their original surface.

Beyond Mars extends a huge distance to Jupiter, occupied by thousands of rock fragments, the asteroids, which form a kind of belt, as if it were a fragmented planet or the pieces that never came together to form it.

In this chapter:

The planet Mercury: Mercury is the closest planet to the Sun and the smallest in the Solar System. It is smaller than Earth, but more ... Read pageThe planet Venus: Venus is the second planet in the Solar System and the most similar to Earth because of its size, gravity, mass, density ... Read pageEarth is our planet: Earth is ours planet and the only one inhabited. It is located in the ecosphere, a space that surrounds the… Read page Structure of the Earth: The Earth is made up of numerous layers, some external and some internal. The structure of the Earth is… Read page Earth's movements and stations: The Earth's orbit is elliptical: there are times when it is closer to the Sun and… Read page The Meteorites: The word meteor means “phenomenon of the sky” and describes the light that occurs when a fragment of matter ... Read pageThe Moon is our satellite: The Moon is the only natural satellite of the Earth and the only body of the Solar System, in addition to the Sun ... Read pagePhases of the Moon and eclipses: The movement of the Moon in its orbit around the Earth makes the Sun illuminate it differently ... Read pageThe planet Mars: Mars is the fourth planet in the Solar System. Known as the red planet for its pink tones, the Romans ... Read pageThe 2 satellites of Mars: The planet Mars has two satellites or moons, Phobos and Deimos. They are small and spin fast near the planet ... Read page Mars: Mount Olympus: Mount Olympus on Mars is the largest known volcano in the Solar System. It is located in the hemisphere ... Read pageThe Asteroids: The asteroids are a series of rocky or metallic objects that orbit the Sun, mostly in the belt ... Read pageThe Asteroid Belt: Between the orbits of Mars and Jupiter there is a region of 550 million kilometers orbiting about 20… Read Page