New studies from Germany and Hong Kong pinpoint specific sources of light pollution keeping our cities excessively bright at ...

This photo of Paris was taken at 9:54 p.m. local time on March 14, 2025 from 261 miles (420 kilometers) above the city through a window aboard the International Space Station.

When millions of people turn off their lights for Earth Hour each year, something remarkable happens in the night sky above ...

Once the sun is down, pilots rely on instruments and navigation tools to help guide them, pilots must also regularly practice ...