Cirrus clouds at the level of the jet stream – often about 6 miles (10 kilometers), above the ground – can sometimes move at over 200 miles per hour (320 kilometers per hour).

During the day, contrail cirrus, like clouds, can actually reflect the sun's radiation, cooling the atmosphere. But at night, they trap heat in the atmosphere.

Cirrus clouds at the level of the jet stream – often about 10km above the ground – can sometimes move at more than 320km/h. But because they are so high up, it’s often hard to tell how fast ...

Beyond their visual allure, these dusty galactic cirrus clouds play a vital role in our understanding of the universe. Astronomers keenly study their intricate structures to unravel the secrets of ...

NORFOLK, Va. — When high, thin cirrus clouds are overhead, it’s not uncommon to see a halo -- a circular ring of light --appear around the sun. It is often characterized by its vibrant ...