Social media users were perplexed by unusual sighting in the viral video, with one saying "genuinely what is this." ...

A viral image on Reddit is challenging viewers to spot a plane mid-flight in the sky – and only those with sniper-like vision are able to detect the flying aircraft ...

The sky is awash with radio-frequency interference (RFI), but thanks to two astronomers who tracked down a stray TV broadcast reflected off a passing airplane, there may be a new way to wipe out ...

Observers could see up to seven planets line up in the sky after sunset on Friday, but you may need a telescope to see them all.

A seven-planet alignment will take place Friday and stargazers won't want to miss the rare spectacle. While NASA says it's unlikely that all the planets will be visible to the naked eye, ...

A U.S. military aircraft crashed off the San Diego coast in California on Wednesday during a so-called "go-around maneuver" in which the plane landed and was taking off again, according a Navy ...