The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

Winter may seem dreary, but its sunsets are often vibrant. Discover the stunning array of colors that can light up the sky ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

NASA’s Curiosity rover captured stunning images of Martian twilight clouds, revealing iridescent dry ice formations on Mars.

Rising temperatures are fueled, in part, by declining cloud cover — which could be a potential climate feedback loop.

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

Look up this week for February’s full snow moon and to catch the last glimpse of a visible parade of planets in the night sky ...

Readers’ photos celebrate sunrises and sunsets, when the light is the most pleasing. Fifty-one photos were sent in; here are ...

Arizona has some of the prettiest sunsets, but why? There's a science behind it. Here's what to know, including sunset times ...

Rainbows Rainbows are one of nature's most enchanting spectacles, forming beautiful arcs of color in the sky. They occur when ...

Sunday will be a calmer day with a little more cloud cover scattered across the region as temperatures climb to near normal for early February in the low 40s. We are going to then warm up briefly ...

What's next: Monday’s high will be about 42 degrees with a mix of sun and clouds. The rest of the week should be fairly quiet with highs coming in a bit above average, which is around 32 degrees ...