1. Venus: The hottest planet due to a runaway greenhouse effect.
2. Mercury: Close to the sun, but has no atmosphere to trap heat, leading to extreme temperature swings.
3. Earth: Just the right distance from the sun for liquid water and a comfortable temperature.
4. Mars: Thin atmosphere, leading to cold temperatures and large variations.
5. Jupiter: A gas giant, with internal heat sources.
6. Saturn: Another gas giant, with internal heat, but cooler than Jupiter.
7. Uranus: An ice giant, with a very cold atmosphere.
8. Neptune: The furthest planet, also an ice giant and the coldest in our solar system.
Note:
* This order is based on average surface temperature. The actual temperature on any planet can vary significantly depending on location and time of day.
* The temperatures of gas giants like Jupiter and Saturn are internal temperatures, as they don't have solid surfaces.
* Pluto, although once considered a planet, is now classified as a dwarf planet and has a very cold surface temperature.
