[boris]

Possessives of planetary bodies:

Pertaining to or of Mercury: Mercurian?
Pertaining to or of Venus: Venusian (not venereal!)
Pertaining to or of Earth: Terran
Pertaining to or of Earth's Moon: Lunar, perhaps "Cynthian"
Pertaining to or of Mars: Martian
Pertaining to or of Jupiter: Jovian
Pertaining to or of Saturn: Saturnian (not Saturnine!)
Pertaining to or of Uranus: Uranian
Pertaining to or of Neptune: Neptunian
Pertaining to or of Pluto: Plutonian

Pertaining to or of Phobos:
Phobone?
Phobosian?
Phobonian?
Phoboan?
Any or all of the above?

--Boris

P.S. There is a town or city in the United States named after every planet, except one. Yup. Uranus. Firstly, nobody wants to live in Uranus, and secondly nobody wants to ask directions: "Hey buddy, how do I get to Uranus?"

[petuniasevan]

Pertaining to or of Venus: Venusian (not venereal!)

Venereal - that's another area of human endeavor :-P

I'm guessing that the possessive of Phobos is Phobian.

[petuniasevan]

But there IS a Uranus, Antarctica!

Their weather is not too Uranian.

http://www.wunderground.com/global/stations/89264.html