Alien planets are far away but extreme lasers on Earth are giving scientists a way to investigate what they're like.

Small, rocky planets can coalesce around a wide variety of stars, suggesting that Earth-like alien worlds may have formed early and often throughout our Milky Way galaxy's history, a new study reveals ...

New SETI research suggests space weather like solar winds could be interfering with alien radio signals, making them harder to detect.

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new ...

Explore the Drake Equation, a formula created to quantify the odds of detecting extraterrestrial life, and the arguments for ...

"I usually try not to call things 'Rosetta stones,' but this is as close to a Rosetta stone as anything I've seen," said co-author John Johnson, also of Caltech. "It's like unlocking a language that ...

August has been a month jam-packed with cosmic phenomena visible from Earth – from nebulas to meteor showers to planetary conjunctions. But the month isn't over yet. And now, add to the mix one of the ...

Despite the universe's vastness, containing billions of stars and galaxies, humanity has yet to encounter alien life.

"Milky Way season," when our galaxy's bright center is most visible, is now beginning in the Northern Hemisphere. The best time to see the Milky Way in the U.S. is generally from March to September.

It may be our galactic neighborhood, but it is not always easy to see. However, that is about to change. For the next several months, the iconic band of hazy light, known as the Milky Way, should ...