Proxima Centauri b is the closest world beyond our solar system that we know of, but scientists are checking to see if it's alone. Eric Mack has been a CNET contributor since 2011. Eric and his family ...

Back in April, Stephen Hawking and billionaire space enthusiast Yuri Milner announced an ambitious long-term program: Breakthrough Starshot. The venture aims to send small, postage-stamp sized probes ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The nearest alien planet to Earth may not be an only child. Astronomers have spotted a dusty ring ...

The star closest to the sun hosts a planet that may be very much like Earth, a new study reports. Astronomers have discovered a roughly Earth-size alien world around Proxima Centauri, which lies just ...