https://en.wiktionary.org/wiki/areography
> "The scientific study of the planet Mars' geographical features;"
Wait, theres that word again...
Also Topography refers to physical features whereas Geography is much more broad. Funny that there doesn't seem to be a single word for it.
"γῆ • (gê) f (genitive γῆς); first declension
1. land, earth 2. country 3.soil"
I. earth opp. to heaven, or land opp. to sea; κατὰ γῆν on land, by land
2. earth, as an element, opp. to air, water, fire
II. a land, country; γῆν πρὸ γῆς from land to land
III. the earth or ground as tilled
IV. a lump of earth, in the phrase γῆν καὶ ὕδωρ αἰτεῖν, γῆν καὶ ὕδωρ διδόναι, in token of submission
http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%... is a much more detailed, less quotable dictionary entry.
As you can see, the greek word refers equally well to the planet (sense I, "the earth, including land and sea, in contrast to heaven") and the dirt (senses 2, III, and IV), just like the english word.