- #1
ecastro
- 254
- 8
I have read in a book that the reason Earth-size planets become candidates for habitable planets is because of their capability to hold an atmosphere; a planet smaller than Earth would have a thinner atmosphere and otherwise if it is larger. My question is, does this size matter because of its gravitational pull to maintain an atmosphere? Can't planets having the same gravitational pull as our Earth become habitable as well; like massive planets with a larger size, or less dense planets with a smaller radius?