Skywriting is the OG form of text messaging, printing words thousands of feet in the air, but how does it actually work? The ...

The point at which Mercury appears most distant from the sun in Earth's sky, known as its point of greatest elongation, will occur at 00:37 a.m. EDT (0437 GMT) on July 4, according to stargazing ...

Aircraft and drones are required to have special sets of lights to make them visible after nightfall. Though not all lights are duplicated in each craft, here is what they include, according to ...

If the sky is full of clouds and overcast, from the ground you won’t see that pretty of a sunset. But if you hopped on a plane, crossing the boundary layer of the atmosphere, you would probably ...

The plane’s engines expel their hot, humid breath, ... On clear days, the resulting contrails are stark and white, accentuating the sky’s watery blue. At sunset, ...

The Moon passes 0.5° south of Spica at 11 A.M. EDT. The pair hangs in the evening sky, located in the south an hour after sunset. By this evening, the Moon has moved some 6.3° southeast of Spica ...