This chart shows how long each planet takes to complete one orbit around the Sun, measured in Earth years. Mercury races around in just 0.24 years (88 days), while Neptune needs 164.8 years - meaning it has completed only one full orbit sin...
About: Planets by Orbital Period Around the Sun
Overview of the data behind this chartAI Insight
Orbital periods grow much faster than distance from the Sun, exactly as Kepler's third law predicts: Neptune is 30 times farther out than Earth but takes 165 times longer to orbit. The inner four planets all finish a lap within two Earth years, while the outer giants live on a completely different clock - Uranus takes 84 years, so a person born there would celebrate their first birthday at the end of a long human life. Neptune, discovered in 1846, completed its first observed full orbit only in 2011. The practical consequence shapes space exploration: launch windows to Mars open every 26 months as the fast inner planets realign, while missions to the outer planets get one favorable planetary lineup every couple of decades.
Key Findings
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Planets by Orbital Period Around the Sun
Data Insights
Numbers, trends & sources behind this chartCategory Rankings
Orbital Period (Earth Years) · All Time| # | Category | All Time |
|---|---|---|
| 🥇 | Neptune | 164.79 |
| 🥈 | Uranus | 84.02 |
| 🥉 | Saturn | 29.45 |
| 4 | Jupiter | 11.86 |
| 5 | Mars | 1.88 |
| 6 | Earth | 1 |
| 7 | Venus | 0.62 |
| 8 | Mercury | 0.24 |
What This Data Shows
Auto-generated trend summaries per categoryFull Data Table
8 records across 1 yearData Sources & References
All external sources cited in this datasetRelated Charts
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