Home > Our Planet > Why Is The Sky Blue? Why Is The Sky Blue? Our Planet Share on Pinterest Dr. Carolyn has a PhD in Astrophysics and she previous worked at NASA, Caltech, and the American Astronomical Society. In this video she discusses light waves and why the sky appears the color blue. Share on Pinterest Related Posts How The Grand Canyon Was Made 100 Million Year Old Dinosaur Discovered In Canadian Oil Field How Do Ocean Tides Work? The Bajau Laut have genetically adapted for extended sea dives How Big Is The Atmosphere?