planetologyn.

1865 G. Hinrichs in Amer. Jrnl. Sci. 39 46 (heading) Introduction to the mathematical principles of the Nebular Theory, or Planetology.

1907 P. Lowell in Cent. Mag. Nov. 113 Planetology we may call this science of the making of worlds, since it concerns itself with the life-history of planetary bodies from their chemically inert beginning to their final inert end.

1959 Wall St. Jrnl. 25 July 8/2 ‘We believe lunar science, or planetology, is here to stay,’ he says.

1977 M. Washburn Mars at Last! iii. vii. 85 Careful studies of the earth and the other planets—how they differ and what they have in common—has given us a new and important area of scientific investigation: comparative planetology.

1996 Interzone Jan. 13/1 During the 21st century I'd gained genuine qualifications in physics and piloting and planetology and such.

1908 Cent. Mag. Feb. 505/1 This gives us a most instructive glimpse into one planetologic process.

1969 Jrnl. Brit. Astron. Assoc. 79 195 Any geological or planetological development is an intricate continuous process.

1996 K. S. Robinson Blue Mars 432 It had an intrinsic worth that transcended even its value as a planetological specimen.