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

Some 25 million radio signals were detected, but all were eliminated by a clever computer code as terrestrial radio frequency interference. When you purchase through links on our site, we may earn an ...

"At this point, we can rule out TRAPPIST-1d from a list of potential Earth twins or cousins." There's bad news for our hopes of habitable planets existing around TRAPPIST-1, with the James Webb Space ...