A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of our closest stellar neighbors, a ...

The universe is always moving. While we've found evidence of rogue black holes and planets, new research suggests that a passing star could be out there somewhere. Unfortunately, If it were to swing ...

In a breakthrough for exoplanet science, astronomers have discovered three Earth-sized planets orbiting both stars in a compact binary system located around 190 light-years away. The system, known as ...

Could a passing star be on a collision course with our solar system and, eventually, Earth? It’s difficult to know if such an outcome is likely. Recently, researchers have found the Milky Way likely ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. After decades of ...

Astronomers have spotted four smaller-than-Earth exoplanets orbiting the closest single-star system to us, called Barnard’s Star. According to the astronomers, these exoplanets — which are among the ...

Scientists like to refer to our planet as residing in the “Goldilocks zone,” where it’s neither too hot nor too cold, and just the right distance away from the Sun to support life. But in the classic ...