Though sun halos can happen year-round, they are especially noticeable in the winter when ice-filled cirrus clouds are more common.

They can look similar to bubbles in soap or oil over water that give a rainbow appearance. They also have a similar appearance to the rainbow observed on a mother-of-pearl gemstone. Sign up for our ...

It’s not the aliens, it isn’t the end of days, what you’re looking at is an ice pillar, also known as a light pillar.

Photos of colorless, phantom-like rainbows mysteriously shining over the Texas Gulf Coast have been recently circulating on ...

Martian clouds are almost always made of dry ice, or frozen carbon dioxide. 95% of the planet's atmosphere is CO2.

The clouds, composed of carbon dioxide ice crystals, glow in shades of red, green, and pearlescent hues in the martian ...

Twilight clouds were first observed on Mars by NASA's Pathfinder mission in 1997. This rare atmospheric phenomenon has not ...

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

NASA’s Curiosity rover has captured breathtaking images of red and green-tinted clouds drifting across the Martian sky. These ...

Southern California faces the continued risk of rock and mudslides on wildfire-scarred hillsides Friday, a day after heavy ...

At the surface, Mars is a desolate, barren world with a rocky landscape, massive dust storms and extreme temperature swings.