Venus itself spins backwards once every 243 Earth days - almost too slow to notice. Its clouds do not wait for it: they race around the planet in about 4 Earth days, roughly 60 times faster than the ground beneath them. Watch the cloud streaks lap the planet again and again while the yellow body marker barely turns.
Published figures: solid body rotation about 243 Earth days (retrograde); cloud-top layer circuit about 4 Earth days; superrotation ratio about 60x; cloud-top wind speed up to about 360 km/h (224 mph); solid-body equatorial speed about 6.5 km/h (4 mph); cloud deck altitude about 45-70 km.
Drag to orbit and scroll or pinch to zoom. Drag the speed slider, pause or play, reset to day 0, and toggle the wind streaks or the solid-body marker on and off.
Venus Atmospheric Super-Rotation 3D Explorer
Venus's solid body spins backwards so slowly that one rotation takes about 243 Earth days. Its cloud deck ignores that pace entirely: the cloud-top layer circles the whole planet in about 4 Earth days, roughly 60 times faster than the ground beneath it. This explorer plays both real rotation rates back at the same timelapse speed, so the speed difference you see on screen is the real published ratio.
Press play and watch the cloud-top wind streaks lap the planet again and again while the yellow marker on the solid body barely turns. Drag the speed slider to run the clock faster or slower, or reset to day zero and step through it again.
- Watch a ring of cloud-top wind streaks complete a full circuit of the planet in about 4 simulated Earth days
- Watch a marker on the solid body complete a full circuit in about 243 simulated Earth days - about 60 times slower
- Drag the speed slider (0.5 to 20 simulated Earth-days per second), pause or play, or reset to day zero
- Toggle the cloud-top wind streaks or the solid-body marker on and off
- Read the live day counter and a full figures table in the facts panel
- Drag to orbit, scroll or pinch to zoom
- Runs fully in the browser with the vendored three.js engine - no account, no upload
| Figure | Published value |
|---|---|
| Venus solid-body rotation | retrograde, about 243 Earth days |
| Cloud-top layer circuit | about 4 Earth days (published range: about 4 to 4.5 days) |
| Superrotation ratio | about 60 times faster than the solid body |
| Cloud-top wind speed | measured as high as about 360 km/h (224 mph) |
| Solid-body equatorial speed | about 6.5 km/h (about 4 mph) |
| Cloud deck altitude | about 45 to 70 km (sulfuric-acid clouds) |
| First observed | ground-based UV cloud-tracking, 1960s; confirmed by Mariner 10's 1974 flyby |
| Detailed jet mapping | JAXA's Akatsuki orbiter, 2015-2025 (mission ended September 2025) |
The mismatch is the whole story: nothing about Venus's slow 243-day spin explains clouds that lap the planet every 4 days. Researchers have tracked the cloud-top jet since the 1960s from ground-based observatories, and Japan's Akatsuki orbiter mapped it in detail between 2015 and 2025. A 2020 study using Akatsuki data (Horinouchi et al., published in Science) found that thermal tides - patterns driven by solar heating - transport angular momentum up to the cloud-top jet, offsetting the friction that would otherwise slow it down. Why the whole system settles at roughly 60 times the planet's own rotation speed, rather than some other ratio, remains an active research question.
For Venus's own slow backwards spin and its resulting day length, see the Venus Retrograde Rotation Explorer. For the telescope-visible phases of Venus as seen from Earth, see the Venus Phases (Galileo) Explorer. For why Venus is the hottest planet in the solar system despite reflecting most of its sunlight, see the Venus Runaway Greenhouse Explorer. This page covers a fourth, distinct story: the atmosphere's own circulation speed.
Everything renders on your device with WebGL. The 3D engine loads once (about 0.7 MB) and is cached.
This is an educational approximation, not a general circulation model or a live atmospheric-dynamics model. Both rotations shown use the same two real measured periods played back at the same timelapse speed, so the visible speed difference is the real ratio, not exaggerated for effect. The solid-body marker is a teaching aid - in reality the rocky surface is permanently hidden beneath the clouds - and the wind-streak shapes and cloud color are illustrative, not real satellite imagery. Sizes are compressed for readability.
Frequently Asked Questions
What is Venus's atmospheric super-rotation?
It is the fact that Venus's cloud-top layer circles the whole planet in about 4 Earth days, even though the solid body beneath it takes about 243 Earth days for one backwards rotation - the clouds move roughly 60 times faster than the ground.
How fast do Venus's clouds actually move?
Cloud-top winds have been measured at up to about 360 km/h (224 mph). The solid body's own equator, by contrast, moves at only about 6.5 km/h (4 mph) because the planet's 243-day rotation is so slow.
Why doesn't Venus's slow spin slow the clouds down too?
That is the open research question. A 2020 study using data from JAXA's Akatsuki orbiter (Horinouchi et al., published in Science) found that thermal tides - patterns driven by solar heating - transport angular momentum up to the cloud-top jet, offsetting the surface friction that would otherwise slow it down. Exactly why the system settles at about 60 times the planet's rotation speed is still being studied.
How was super-rotation discovered?
Ground-based observers tracked ultraviolet markings in Venus's clouds moving far faster than the planet's known rotation starting in the 1960s. NASA's Mariner 10 flyby returned confirming imagery in 1974, and Japan's Akatsuki orbiter mapped the equatorial jet in detail between 2015 and 2025.
Where in Venus's atmosphere does this happen?
The effect is strongest near the top of Venus's sulfuric-acid cloud deck, roughly 45 to 70 km above the surface - the same layer this explorer's translucent cloud shell and wind streaks represent.
Does the speed slider change the real 60x ratio?
No. Both the cloud-top layer and the solid body always keep their real measured periods (4 days and 243 days). The speed slider only changes how fast simulated time passes, so you can watch a realistic amount of the cycle in a few seconds instead of waiting 243 real days.
Is this the same as the Venus rotation, phases, or greenhouse pages?
No. The Venus Retrograde Rotation Explorer covers the solid planet's own backwards spin and day length. The Venus Phases (Galileo) Explorer covers the telescope-visible phases of Venus. The Venus Runaway Greenhouse Explorer covers why Venus is so hot. This page covers a fourth story: how fast the atmosphere itself circulates.