The two alien worlds make extremely close approaches to each other every 97 days, on average; during those cosmic family reunions, the two planets are separated by less than five Earth-moon distances.

Is intelligent alien life really out there? With powerful telescopes identifying more potentially habitable planets each year ...

The flares may heat up and inflate the planet's atmosphere, which is dominated by hydrogen and helium. Being lashed by these ...

Using the now-retired Kepler space telescope, astronomers have discovered that larger planets grow up in more turbulent homes than smaller worlds.

Comet or asteroid heading for the Sun is only the third time an interstellar object has been spotted inside our group of ...

Is there really alien life on this exoplanet? We asked 10 experts. A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b.

Scientists using The James Webb Space Telescope have uncovered potentially earth-shattering evidence indicating a faraway world could be home to alien life.. A team at the University of Cambridge ...