Escape Velocity of Venus
| Value | 10,360 m/s |
| Status | Conventional / typical value |
| Source | NASA NSSDC Planetary Fact Sheet, Venus (escape velocity) |
| Categories | Astronomicalsolar-systemplanets |
| millimeter per year | 326,936,740,000,000 mm/yr |
| millimeter per hour | 37,296,000,000 mm/h |
| foot per day | 2,936,692,900 ft/d |
| inch per hour | 1,468,346,500 in/h |
| meter per day | 895,104,000 m/d |
| millimeter per minute | 621,600,000 mm/min |
| meter per hour | 37,296,000 m/h |
| inch per minute | 24,472,441 in/min |
| millimeter per second | 10,360,000 mm/s |
| foot per minute | 2,039,370.1 ft/min |
| centimeter per second | 1,036,000 cm/s |
| meter per minute | 621,600 m/min |
| inch per second | 407,874.02 in/s |
| kilometer per hour | 37,296 km/h |
| foot per second | 33,989.501 ft/s |
| mile per hour | 23,174.66 mph |
| knot | 20,138.229 kn |
| meter per second | 10,360 m/s |
| mach (sea level) | 30.444263 Ma |
| kilometer per second | 10.36 km/s |
| speed of light | 0.00003455724 c |
Learning zone
Venus holds its atmosphere as firmly as Earth holds ours — 10.36 against 11.19 km/s — and the result is 92 bar of carbon dioxide that is not going anywhere. What Venus lost was not gas in bulk but one specific ingredient: water. With no protective magnetic field, ultraviolet light split any water vapour high in the atmosphere and the solar wind carried the hydrogen away. The fingerprint survives in the deuterium-to-hydrogen ratio, about 150 times Earth's — heavy hydrogen escapes less readily, so its enrichment records an ocean's worth of loss.
The deep gravity well also makes Venus the worst major planet to leave. Any future sample return would face nearly Earth-magnitude ascent physics while launching through a 65 kg/m³ atmosphere at 737 K — one reason no mission has ever attempted it, and why proposals for crewed exploration hover in the temperate cloud layer at 55 km rather than land.