Earth-Size Planets Come in Two Flavors: Rocky or Gassy
Monday, January 6, 2014 - 21:00
in Astronomy & Space
"Super-Earth" planets (those one to four times as wide as Earth) can be either rocky like our home or gassy like Neptune.
"Super-Earth" planets (those one to four times as wide as Earth) can be either rocky like our home or gassy like Neptune.