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Why Is the Sky Blue? | NESDIS | National Environmental Satellite, Data, and Information Service

Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

· National Environmental Satellite, Data, and Information Service· archived 5/23/2026, 9:45:16 AMscreenshotcached html
Why Is the Sky Blue? | NESDIS | National Environmental Satellite, Data, and Information Service
Skip to main content The Short AnswerGases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Watch this video about why the sky is blue! Voiceover provided by NASA scientist Dr. Moogega Stricker. This content was produced by the NASA Space Place team at NASA's Jet Propulsion Laboratory for NESDIS with funds from the GOES-R Series program and the JPSS program. Publication Date: August 31, 2025