unfamiliar territory

an area of knowledge unknown to the speaker. We are in unfamiliar territory and I don't know the answer. Astronomy is unfamiliar territory for me, and I cannot answer any questions about the stars.

Common Names:

Name	Pronounced	Usage
ÓLafur	-	Icelandic
Gunter	-	German
Leach	[li:tʃ]
Gayatri	-	Hinduism, Indian, Marathi, Hindi
ÉNna	AY-na	Irish
Anahid	-	Armenian