Composition of Venus' Atmosphere
Key Findings
About This Dataset
Composition of Venus' AtmosphereVenus's atmosphere is 96.5% carbon dioxide and 3.5% nitrogen, a composition broadly similar to Mars yet with dramatically different consequences. Because Venus's atmosphere is roughly 90 times as massive as Earth's, that carbon dioxide traps heat in a runaway greenhouse effect, producing surface temperatures near 465 C, hot enough to melt lead. Everything beyond CO2 and nitrogen exists only in trace amounts: sulfur dioxide (about 0.015%) feeds the planet's thick sulfuric-acid clouds, while argon, water vapour and carbon monoxide register at just a few parts per million. The near-total absence of water and free oxygen, together with the crushing carbon-dioxide load, makes Venus a cautionary example of how the very same dominant gas yields a frozen desert on Mars but a furnace on Venus, depending on atmospheric mass.
Data Insights
Numbers, trends & sources behind this chart
Methodology & source
- Data source
- NASA / Atmosphere of Venus
- Coverage
- 6 entities · 6 observations
- Measure
- Share of Atmosphere (% by volume)
- Last updated
- 7 July 2026
- Compiled by
- The ANYSTAT team, from the source above
- Values are shown as reported by the source. Nothing is rescaled, rebased or converted — the only changes are thousand separators and decimals shown to two places.
- Entities are ranked highest-first on their value.
Data Sources & References
All external sources cited in this dataset
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