You’ve traveled thousands of light-years through interstellar star systems. And now you’re stranded on a planet you know nothing about. As long as you’ve got oxygen, water and food aboard your ...

Project Serpo: The Secret 10-Year Mission to a Planet 40 Light Years Away What if you were offered the opportunity to visit another planet? You get to experience the culture of an alien race, explore ...

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But not everyone agrees that it signals life. An illustration shows what ...