A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But ...

Further studies are needed to determine whether K2-18b, which orbits a star 120 light-years away, is inhabited, or even ...

K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

Where else are astronomers searching for life? In our solar system, Earth is one of only three planets, along with Mars and Venus, that fall within the habitable zone. On Mars, two of NASA's ...

Where else are astronomers searching for life? In our solar system, Earth is one of only three planets, along with Mars and Venus, that fall within the habitable zone. On Mars, two of NASA's ...