In recent months, eight U.S. cities have experienced unnaturally colored skies—ranging from eerie green glows and purple ...

The Vera C. Rubin Observatory, located on a mountaintop in Chile, unveiled vibrant images Monday of colorful nebulas, stars ...

In western India, ‘islands’ in the sky are one of the world’s biodiversity hotspots. A rare green meteor appears above the sky islands of India's Western Ghats mountains. Islands are not ...