This chart compares how long a full day lasts on each planet of the Solar System, measured in Earth hours from one sunrise to the next. Jupiter has the shortest day at under 10 hours, while a single day on Venus lasts 2,802 hours - about 11...
About: Planets by Length of Day
Overview of the data behind this chartAI Insight
Planet size and day length are strikingly mismatched: Jupiter, the largest planet, spins fastest with a 9.9-hour day, while small Venus takes 2,802 hours - the slowest rotation in the Solar System, and it even spins backwards relative to the other planets. The gas giants all rotate quickly (10 to 17 hours), a leftover of the angular momentum they hoarded while forming, and their speed is what flattens them visibly at the poles. Among rocky planets, Earth and Mars are near-twins at 24 and 24.7 hours, one reason Mars mission planners can keep crews on an almost-normal schedule. Mercury's 4,222-hour day means one Mercury day outlasts its own year, which takes only 88 Earth days.
Key Findings
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Planets by Length of Day
Data Insights
Numbers, trends & sources behind this chartCategory Rankings
Length of Day (Earth Hours) · All Time| # | Category | All Time |
|---|---|---|
| 🥇 | Mercury | 4,222.60 |
| 🥈 | Venus | 2,802 |
| 🥉 | Mars | 24.70 |
| 4 | Earth | 24 |
| 5 | Uranus | 17.20 |
| 6 | Neptune | 16.10 |
| 7 | Saturn | 10.70 |
| 8 | Jupiter | 9.90 |
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
Planets by Orbital Period Around the Sun Related Chart
Planets by Average Temperature Related Chart
Planets by Surface Gravity Related Chart
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