Why do stars twinkle?
Show answer & explanation
Answer: Atmosphere turbulence bends light
Distance makes light flicker — Wrong. Distance doesn't cause twinkling. Atmospheric turbulence does—moving air pockets of different temperatures/densities bend light differently, creating twinkle.
Space dust blocks starlight — Wrong. Dust can dim starlight, but twinkling comes from atmospheric turbulence—moving air with varying density randomly bending light paths.
Atmosphere turbulence bends light ✓ — Correct! Twinkling (scintillation) occurs when starlight passes through Earth's turbulent atmosphere. Moving pockets of air with different temperatures and densities bend light slightly differently, causing rapid brightness/position changes. Planets don't twinkle much because they're closer—larger apparent size averages out the atmospheric effects. Astronomers build telescopes on mountains to reduce atmospheric turbulence!
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