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Ist die Venus ein gesteinsplanet?
Die Venus ist mit einer durchschnittlichen Sonnenentfernung von 108 Millionen Kilometern der zweitinnerste und mit einem Durchmesser von ca. 12.100 Kilometern der drittkleinste Planet des Sonnensystems. Sie zählt zu den vier erdähnlichen Planeten, die auch terrestrische oder Gesteinsplaneten genannt werden.
Was ist das Besondere an der Venus?
Mit einer mittleren Oberflächentemperatur von 464°C ist die Venus der heißeste Planet im Sonnensystem. Eine weitere Besonderheit der Venus ist, dass sie sich in entgegengesetzter Richtung zu den meisten anderen Planeten um ihre eigene Achse dreht.
How long does it take Venus to rotate?
In 1963, Earth-based radar observations penetrated the cloud cover and were able to measure a rotation rate of 243 days; more surprising is that Venus rotates on its axis in the opposite direction from that of most planets, so-called retrograde rotation.
How long is a day on Venus compared to Earth?
Altering day–night cycle. A Venusian sidereal day thus lasts more than a Venusian year (243 versus 224.7 Earth days). However, the length of a solar day on Venus is significantly shorter than the sidereal day; to an observer on the surface of Venus, the time from one sunrise to the next would be 116.75 days.
When did we discover that Venus is in retrograde?
Later work in the 1950s showed the rotation was retrograde. Radar observations of Venus were first carried out in the 1960s, and provided the first measurements of the rotation period, which were close to the modern value. Radar observations in the 1970s revealed details of the Venusian surface for the first time.
These three changes are closely interrelated because Venus’s extreme temperature is due to the high pressure of its dense atmosphere and the greenhouse effect . Prior to the early 1960s, the atmosphere of Venus was believed by astronomers to have an Earth-like temperature.
https://www.youtube.com/watch?v=63MuG-BAxpo