These strange noctilucent clouds thrill skywatchers throughout the summer months. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Clouds form when water vapor – an invisible gas in the atmosphere – sticks to tiny floating particles, such as dust, and turns into liquid water droplets or ice crystals. In a newly published ...

New images captured by NASA's Curiosity rover show colorful clouds in the sky over Mars. The images were captured by the rover's Mastcam, which NASA's Jet Propulsion Laboratory compared to the ...