Here we look at some of the most habitable exoplanets ever discovered ranked through their similarity to Earth. The result is a list of 16 exoplanets that could one say serve as an Earth 2.0 ...

The gas has been observed directly by the James Webb Space Telescope on four exoplanets, all belonging to the HR 8799 system, located 130 light-years from Earth. The detection of CO 2 offers clues ...