Space & Atmosphere
Why Do Stars Twinkle?
Stars do not actually flicker. Earth's atmosphere bends their light in constantly shifting ways, creating the twinkling effect. Planets do not twinkle for a specific reason.
starsatmosphere
Space & Atmosphere
Why Are Sunsets Red?
Sunsets are red because sunlight travels through far more atmosphere at a low angle, scattering away blue light and leaving only red and orange to reach your eyes.
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Light & Atmosphere
Why Is the Sky Blue?
The sky is blue because blue light scatters off air molecules more strongly than red light, filling the daytime sky with scattered blue wavelengths.
skylight