Wind hitting Venus's mountains makes the planet rotate faster

Christopher Davidson
June 21, 2018

According to calculations, this impacts the duration of the Venusian day can increase or decrease for a few minutes. Due to the fact that the elemental volume of air, moved up, to implement the restoring force (in this case gravity) in the gas shell of the planet are generated gravitational waves. However, a new study suggests that an unusual weather event could cause the length of a day on our planet's closest neighbor to change by a maximum of two minutes.

In the future, astronomers hope to make their model more accurate and take into account the influence of the Sun on the planet's rotation rate. It might be strong enough to actually shorten a Venusian day under extreme circumstances, according to a new planetary model developed by researchers from UCLA and University of Paris-Saclay in France in France. Its super dense atmosphere, heated to hellish temperatures, rotates 60 times faster than the planet itself, causing super-power of the wind, moving at a speed of 500 kilometers per hour, and a day it lasts longer than a year is 240 and 224 earth days. As a result, Venus spins at different speeds.

Venus fully rotates around its own axis once every 243 Earth days, and it is revolving around the sun, in the opposite direction as Earth, in only 225 days.

Researchers say that unique bulge in Venus' mountains interacts with its atmosphere. After adding in all known ingredients in Venus's atmosphere and accounting for the planet's size and density, they finished by adding mountains on the surface.

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The thick, racing winds pummel and pull at Venus's mountains, producing a 6,200-mile-long wave that Japan's Akatsuki orbiter has previously pictured emerging and vanishing.

This insane motion results in winds of up to 400 kilometres per hour (around 250 miles per hour). The waves change Venus's rotation, which causes atmospheric fluctuations.

"Over several days of observation, the bow-shaped structure remained relatively fixed in position above the highland on the slowly rotating surface, despite the background atmospheric superrotation", Japanese researchers wrote in the 2017 paper that described the wave for the first time.

Once scientists have a tighter grasp on these mechanisms, it could help them figure out a way to probe the interior of the planet, discover the nature of its core, and ultimately figure out what's sustaining Venus's freakish superrotation. They then ran the simulation. In turn, this information could be used to help scientists learn about other weather-related issues on Earth.

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