A recently discovered "super Earth" located around 25 light-years from our planet is not as massive as previously thought, ...

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

For generations, artists and science-fiction writers have imagined alien landscapes beneath twin sunsets. The image became iconic in popular culture long before astronomers confirmed that planets ...

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had ...

Holidaymakers have one major thing in common with scientists who are on the hunt for alien life: their plans are often thwarted by clouds. The clouds on alien worlds are such a long-standing issue – ...

The first sign of possible extraterrestrials detected in the cosmos didn't come in the form of little green aliens flying around in saucer-shaped spacecraft. In fact, the life that could be – emphasis ...

Many have watched recently released UFO videos, but most still think the government knows more than it is saying.

LOS ANGELES (AP) — What was once considered fringe or conspiratorial has in recent months popped up everywhere from the White House to the Catholic Church, as public fascination with unidentified ...