❓ why
Why does Mercury have such extreme temperature swings?
Quick Answer
Mercury has almost no atmosphere to trap heat, so its dayside can reach about 430°C while its nightside can drop below -170°C.
The Full Story
Mercury is the closest planet to the Sun, but proximity alone does not keep a planet warm at night. Its atmosphere is extremely thin, more like an exosphere, so it cannot retain much heat or spread energy around the planet. As a result, the sunlit side can become scorching hot, while the dark side cools dramatically after sunset. Mercury’s long solar day, about 176 Earth days, also contributes to its huge temperature range.
Key Facts
1.Dayside can reach about 430°C
2.Nightside can fall below -170°C
3.Mercury’s solar day is about 176 Earth days
YouTube Angle
Suggested video title for this topic:
"One planet, two climate extremes: Mercury’s brutal temperature swing."
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