Some theories explaining this strange Venusian day cycle go like this: Astronomers think that Venus was impacted by another large planet Instead, he said, further study is needed to discern the causeâor causesâof Venus' slight reduction in speed. For example, consider the Earth and its Moon. The present rotation period of Venus represents an equilibrium state between gravitational tidal locking by the Sun that tends to slow the rotation rate, and an atmospheric tide created by the solar heating of Venus's thick atmosphere. The actual period of rotation of Venus is 243 days. The mechanism behind this, according to the theory, is that. 2020 National Geographic Partners, LLC. With the exception of Mercury, which has some resonance with the sun, the Venus day is by far the slowest of any planet, and for that matter, non-tidally locked object in the Solar System. One possibility is that tidal forces from the Sun tugged Venus just the right way for it to slowly brake and reverse its spin. share. An enormous amount of energy must be dissipated as heat. Thick clouds swirl on Venus in a 2007 picture taken from orbit. "Venus is a mind bender for specialists in atmospheric dynamics. The rotation of the planet Venus is slowing down, according to recent data gathered by the European Space Agency's Venus Express satellite. The current opinion is that Mercury's rotation is slow because of tidal braking by the Sun. Venus spins on its axis from east to west, while Uranus is tilted so far over, it's virtually spinning on its side. Still, "it is difficult to find a mechanism that will cause the average rotation rate to change this much in only 16 years," Venus Express project scientist Håkan Svedhem told National Geographic News. Astronomy. ". They say these structures may be atmosphe Perhaps Venus was also a captured planet that didn't have much spin to start with. Is there an "internet anywhere" device I can bring with me to visit the developing world? It is a head-on collision of their surfaces. The 584-day average interval between successive close approaches to the Earth is almost exactly equal to 5 Venusian solar days, but the hypothesis of a spin–orbit resonance with Earth has been discounted. Prolonged days over most of the northern and southern hemispheres in turn is an obvious example. Thanks to a heavy blanket of carbon dioxide-laden air, the surface pressure on Venus is 90 times what we experience on Earth at sea level, and opaque clouds of caustic sulphuric acid constantly whip around the planet at hurricane speeds. The natural satellites of Mercury … With the new data, there is still no definitive answers, but very interesting theories. For one, Venus has an atmosphere that is incredibly dense (92 times that of Earth, in fact) and reaches temperatures that are hot enough to melt lead. The atmosphere also rotates much faster. Venus has a very slow rotation; in fact, the "day" is longer than the "year"! I heard that one of the main reasons that Venus is so inhospitable is because of its slow spin around the axis is there some truth to it? Why is that? While Earth takes 24 hours to complete one spine, our day on Venus would last 5,832 hours. Venus Spinning Slower Than Thought—Scientists Stumped, Tips to stay focused and finish your hobby project, Podcast 292: Goodbye to Flash, we’ll see you in Rust, MAINTENANCE WARNING: Possible downtime early morning Dec 2, 4, and 9 UTC…. Not only is the rotation slow, it is retrograde, thus rotates in the opposite direction to the other planets - which may be linked to the slow rotation. 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