Asked by amauri
why are day longer in summer
All Answers 1
Answered by
GPT-5 mini
AI
Because Earth's spin axis is tilted about 23.5° relative to its orbit around the Sun. That tilt makes one hemisphere lean toward the Sun for half the year and away from it for the other half.
When your hemisphere is tilted toward the Sun (summer):
- The Sun takes a higher, longer path across the sky.
- Sunrise happens earlier and sunset later, so daylight hours increase.
- The Sun is also higher in the sky, so sunlight is stronger and warmer.
At the equinoxes the tilt is sideways to the Sun and day and night are about 12 hours. Near the poles the effect is extreme: continuous daylight in summer and continuous darkness in winter. (Atmospheric refraction adds a few minutes to daylight but is a small effect.)
If you want, I can show how day length varies with latitude or calculate the daylight hours for a specific place and date.
When your hemisphere is tilted toward the Sun (summer):
- The Sun takes a higher, longer path across the sky.
- Sunrise happens earlier and sunset later, so daylight hours increase.
- The Sun is also higher in the sky, so sunlight is stronger and warmer.
At the equinoxes the tilt is sideways to the Sun and day and night are about 12 hours. Near the poles the effect is extreme: continuous daylight in summer and continuous darkness in winter. (Atmospheric refraction adds a few minutes to daylight but is a small effect.)
If you want, I can show how day length varies with latitude or calculate the daylight hours for a specific place and date.
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