The view shows a rocky hill with filmy, almost fog-like clouds above. These are noctilucent (night-shining ... clouds for several years. While black-and-white photos emphasize the texture of ...

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

Light pollution—the needless shining of bright lights into the night sky—has robbed whole generations ... 911 to express alarm about strange clouds hovering overhead; they were seeing the ...