The Sun Is Actually White, Not Yellow—Earth's Atmosphere Creates the Illusion

For as long as humans have looked skyward, the sun has appeared yellow — a color so familiar it seems inseparable from the star itself. Yet astronauts beyond Earth's atmosphere see something different: a white sun, radiating the full spectrum of visible light without interference. What we perceive as yellow is not the sun's true emission but the signature of our own atmosphere, which scatters away blue wavelengths before they reach our eyes — the same elegant physics that paints the sky blue and the horizon red at dusk.