The Study of the Greek God of War's Planet
This page is the CodyCross answer for the clue below from Physics, Group 1898, Puzzle 4 (Neutron Stars).
Question is: The Study of the Greek God of War's Planet
and the answer is: AREOLOGY
Word Meaning:
AREOLOGY — (astronomy, geology) The scientific observation and study of the planet Mars's geology; geology of Mars.
Definitions from Wiktionary.