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oh the winter is cold and has 12 hrs or darkness, oh how the warm summer as about 5 hrs of darkness, how can this be without spinning faster?
Whose Summer? The southerners or the Northerners?
Quote from: Bored ChemistWhose Summer? The southerners or the Northerners?That made me think!Ignoring daylight savings, locations in Africa (southern hemisphere) are in the same timezone as locations in Europe (northern hemisphere) - so they both spin at the same rate.Africa (southern hemisphere) is in Summer while Europe (northern hemisphere) is in Winter, and vice-versa. So the Earth's spin must not change between Summer and Winter.Logical, really!
Think about the angle between the rotational axis and the light source.If the axis is perfectly perpendicular to the line connecting the planet and light source, then yes, day and night would be exactly the same length for all points on the plant surface.But if the axis points directly at the source of light, then it doesn't matter how quickly the planet spins, one side will always be dark and one side will always be illuminated.If the axis is tilted anywhere in between, then some points will be illuminated longer than others, depending on their latitude...
This video shows how the length of daylight changes throughout the year.