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

Metro Transit is playing a small part to cut down on light pollution. From sundown to sunrise, real-time information signs providing arrival and departure times at many bus rapid transit stops and ...

With each passing night as, the crescent slowly widens and it begins to appear against a progressively darker background, its ...

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...