"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...

NASA’s Curiosity rover captured stunning twilight images of Martian clouds, revealing iridescent red and green tinges. These ...

Snow totals around 5-10" are possible for Flagstaff, with accumulating snow generally falling above 6,500-7,000 feet, especially in west and central northern Arizona. Northeastern Arizona will also ...

The Sun sets differently on Mars. Part of that is due to its distance from the star (an average of 142 million miles versus ...

Curiosity, a set of NASA 's robotic "eyes" on the Red Planet, recorded 16 minutes of so-called noctilucent clouds flying ...