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Why the sky is blue and sunsets are red
Discover the cosmic light show happening right over your head, from the physics of Earth's atmosphere to the blue sunsets of Mars.
4 chapters75 assets
by artiteacher · Jul 26, 2026
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Chapter 1
How light meets our atmosphere
1Sunlight is secretly a rainbow
2The obstacle course in the air
3Lord Rayleigh and the scattering secret
4Why the scattered blue fills the sky
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Chapter 2
The fiery magic of sunsets
1The ultra-long path of evening light
2Why only warm colors survive the journey
3How dust and clouds paint the sky
4Volcanic eruptions and neon sunsets
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Chapter 3
Skies of other worlds
1The butterscotch skies of Mars
2Blue sunsets on the Red Planet
3The orange smog of Saturn's moon Titan
4Emerald and ruby skies of exoplanets
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Chapter 4
Through the human eye
1The mystery of the missing violet
2How human eyes decode the sky
3Leonardo da Vinci's early sky theories
4The sky in ancient mythologies
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