"Milky Way Galaxy is Dominated By Two Types of Alien Worlds" --Rocky Earth-Like Planets and Gas-Enshrouded Mini-Neptunes

New research from Caltech shows that our galaxy has a strong preference for two types of planets: rocky planets up to 1.75 times the size of Earth, and gas-enshrouded mini-Neptune worlds, which are from 2 to 3.5 times the size...