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How to Explore Venus Runaway Greenhouse Explorer 3D
Open the Venus Runaway Greenhouse Explorer 3D, drag the CO2 slider or press Reset, and see why a thick CO2 blanket keeps Venus hotter than Mercury, even though Venus orbits almost twice as far from the Sun.
- Open https://freetoolonline.com/space-3d/venus-runaway-greenhouse.html and wait for Venus to render.
- Drag the CO2 slider away from 96% and watch the haze shell around Venus thin out and change color.
- Press "Reset" to snap the slider back to Venus's real measured composition (96.5% CO2) and read the real 464 C / 737 K surface temperature in the facts panel.
- Turn on the Mercury-comparison toggle to see a to-scale Mercury sphere next to Venus, then read why Mercury - almost twice as close to the Sun - is still colder on average.
- Turn on the pressure-comparison bars to see Venus's 92-bar surface pressure next to Earth's 1 bar and Mercury's near-zero pressure.
- Read the facts panel for the full reference table of every published figure used on this page.
Key published figures
| Figure | Value |
|---|---|
| Venus surface temperature | about 464 C (737 K), day and night |
| Venus surface pressure | about 92 bar |
| Venus atmosphere composition | about 96.5% CO2, about 3.5% N2 |
| Mercury dayside maximum | about 430 C at the equatorial hot poles |
| Mercury night minimum | about -180 C |
| Distance from the Sun | Venus about 0.72 AU, Mercury about 0.39 AU |
Next: the when guide or vs alternatives. Open the Venus Runaway Greenhouse Explorer 3D.
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