The coldest planet in our solar system is Uranus.
Despite being closer to the Sun than Neptune, Uranus holds the record for the lowest temperature ever recorded in our solar system, reaching a frigid -224°C (-371°F). While Neptune experiences colder average temperatures overall, Uranus's minimum temperature is lower.
Why is Uranus so cold?
The reasons behind Uranus's extreme cold are complex and not fully understood, but some contributing factors are:
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Axial Tilt: Uranus has an extreme axial tilt, rotating almost on its side. This unusual orientation leads to extreme seasonal variations and affects the distribution of solar energy across the planet.
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Internal Heat: Uranus appears to radiate very little internal heat compared to other gas giants like Jupiter, Saturn, and Neptune. This lack of internal heat contributes to its lower overall temperature. While Neptune possesses an internal heat source that drives its weather patterns, Uranus does not exhibit a similar level of internal activity.
Temperature Comparison
While Neptune's average temperature is slightly colder than Uranus's average, Uranus holds the record for the absolute lowest temperature measured.
| Planet | Average Temperature (°C) | Minimum Temperature (°C) |
|---|---|---|
| Uranus | -216 | -224 |
| Neptune | -214 | -218 |
In conclusion, although Neptune's average temperature is slightly lower, Uranus registers the coldest minimum temperature in the Solar System, making it the coldest planet.
