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

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

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

The dwarf planet 1 Ceres is in conjunction with the Sun at 5 P.M. EST today. While this means we can't see Ceres for now, we ...

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

The area near clouds is often classified as ‘clear sky’, but a new study demonstrates the potential biases of misclassifying ...

When I started getting interested in photography six years ago, the first thing I was taking pictures of was sunsets. So, the first photo I ever took in a “photographer” mindset was of a sunset.

Around the time of your romantic dinner, head outside and look to the southwest to spot the super brilliant planet in the night sky ...