Image venus


Venus is the second planet in the Solar System, it is 0,7 Astronomical Units from the Sun, about 210 billion footsteps. It is also the closest planet to us, it is about 40 million kilometres from Earth which is only 80 billion footsteps.

The circle in the figure, usually interpreted as a sphere, represents a photograph of the planet taken by the probe Pioneer. The defined lines within the circle are the thick edges of the blanket of cloud that covers the entire planet and prevents us from observing its surface. These carbon dioxide and sulphuric acid clouds create a greenhouse effect by trapping heat between themselves and the planet’s surface, exactly the same way that a woollen jumper holds heat between itself and the body. The temperature during the day on Venus can reach 484° Celsius, the temperature at which even lead melts.

In order to study the surface of this planet, probes with radar equipment have been used. These probes make use of instruments which send out radio waves towards the planet, which are able to penetrate the clouds.

These radio waves are reflected off the planet back to the probe. By looking at how the waves have been changed on their return to the satellite we can begin to build up an idea of what the surface of Venus is like. In this way, as for the other inner planets, we have discovered that Venus’s surface has been shaped by the impact of asteroids and by volcanic activity. Scientists are of the opinion that this volcanic activity is ongoing.

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