title: Exoplanets. Alien worlds galore. Introduction.
authors: Maria
authors: M
authors: Cruz
authors: Robert
authors: R
authors: Coontz
mesh_terms: D018559:Exobiology; D005118:Extraterrestrial Environment; D006859:Hydrogen; D016083:Planets; D014867:Water
chemical_list: D014867:Water; D006859:Hydrogen