NASA Wants Your Help to Study These Rare, High-Altitude Clouds That Appear to Glow at Sunrise and Sunset Noctilucent clouds usually form close to the poles, but in recent decades, they’re being ...

Each year, seasonal winds carry tens of millions of tons of Saharan dust across the Atlantic and beyond. On February 18, 2021, NOAA-20’s VIIRS captured a dramatic display of airborne dust.