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.

Mars is often seen as a barren, rust-colored wasteland, but NASA’s Curiosity rover has just revealed a surprising burst of color in the planet’s skies. New images taken by the rover showcase rare ...

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 "Curiosity" rover has taken a highly fascinating photo on Mars. The photo published on the website of the US space agency ...

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

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

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