Astronomers describe Mercury as an "inferior planet", because its orbital path around the sun is much closer than that of ...

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

Browsing the Internet can help you pass the time on a particularly monotonous flight, but how exactly do they get the ...

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 ...

This month will usher in two separate conjunctions — one between the moon and a rarely-visible Mercury, and another between the moon and Mars.

In the post-sunset sky, look west to find the two standing close together, with Mars just to the upper right of Regulus. Both star and planet are the same magnitude (1.4) but their colors will ...