In the same system as this exciting Earth-like exoplanet, a sub-Neptune-sized planet was discovered too

In the same system as this exciting Earth-like exoplanet, a sub-Neptune-sized planet was discovered too
Life could arise in different ways as life adapts to suit its surroundings
The exoplanet’s atmosphere could be rich in water and methane
Astronomers and geoscientists have joined forces using data from the Sloan Digital Sky Survey (SDSS) to find out what makes a rocky planet Earth-like
The hostile world may have had a shallow liquid-water ocean and habitable surface temperatures
There’s strong evidence for the existence of two distinct types of exoplanet