Venus is the second planet of the inner solar system, the period of which is 224.7 Earth days. This planet received its name in honor of Venus – the goddess of love from the Pantheon in Rome. This is only one of the 8 major planets in the solar system, which was named in honor of a female deity.
Venus – “sister of the Earth”
Venus – is the third brightest object after the sun and moon in the sky of the earth. Due to the fact that Venus is closer to the Sun than the Earth – it is never removed from the Sun is not more than 47,8 ° / for the terrestrial observer /. Reaches its maximum brightness shortly before sunrise Venus or after a certain period after sunset, which gave rise to its name as the Evening Star or the Morning Star.
Venus is classified as Earth-like planets, and sometimes call her “sister of the Earth”, as the two planets the size, composition and gravity are very similar. However, conditions on the 2-worlds very different.
At the surface of Venus hides extremely thick clouds, the clouds of sulfuric acid, a highly reflective characteristics, it does not allow the surface to see in visible light / though its atmosphere is transparent to radio waves, through which was subsequently investigated by the relief of the planet /. Differences due to the fact that under the thick clouds of Venus is, continued until the second century, when many of the mysteries of Venus were not parted planetology. Venus has the densest among other Earth-like planets atmosphere consisting mainly of carbon dioxide.
Compared to the Earth, in the atmosphere of Venus contains sulfur dioxide about a million times more. Most of it is hidden under dense clouds: gas easily destroyed under the influence of sunlight. And any of its discovery in the upper atmosphere can only mean only – it is not so long ago, got there at the bottom.
Mission «Venus Express» already discovered properties of volcanic activity in the recent past / recent, I mean, by geological standards – for the past several hundred thousand years /. Now analysis of the concentration of sulfur dioxide gives another confirmation of the volcanic eruptions in the recent time. Thus, when the outer unit only arrived at Venus in 2006, it immediately showed a significant increase in the density of sulfur dioxide of the upper atmosphere, and then suddenly its decline. To date, the concentration rose again about ten times.
“If you see an increase in sulfur dioxide, then you definitely will be able to say that all this is no accident – said Marc Emmanuel – a leading maker of an article published in« Nature Geoscience ». – After all the individual molecules in the sunshine break in a couple of years. ”
“Thus, the eruption may be thus a catalyst, which is responsible for the increased sulfur dioxide. However it may be that these changes are due not to investigate the features of atmospheric circulation in the flow around the planet – says study co-author, Dr. Jean-Louis Berto, who managed to make this discovery. – Probably, what we see is the result of weathering, much more complex than we could previously imagine myself before. ”
Note that Venus has an atmosphere, in a state of very rapid rotation. Full cycle of the rotation – is only four Earth days, while the period of rotation of the planet has two hundred forty-three day. And, of course, there’s no stopping the strongest / up to three hundred and sixty miles per hour / wind. Therefore, it is necessary to find the point of production of gas is not possible – it instantly blows. The research team suggests that if a change in the atmosphere is really in charge of volcanic activity, while the eruption was not a one, but several.
“I believe that studying in the Venusian atmosphere of gases, we are on the verge of discovery, showing the presence of active volcanoes on Venus,” – says Håkan Swede – scientist mission «Venus Express».
Observation of the European Space Agency carried out over six years for the atmosphere of Venus give the opportunity to nominate an interesting hypothesis. For the last period around this planet significantly changed the concentration of sulfur dioxide, was likely to blame in all of this volcanic eruption. So, Venus is covered with hundreds of volcanoes, but until now has remained a mystery – they are active to this day or not.