Novindus is a previously undiscovered land across the Endless Sea in Raymond E. Feist's world of Midkemia from his Riftwar novels, which are my favourite fantasy novels after Tolkien's works.
It's about the size of Australia, where I'm from, and there's a character from there named Jommy, who appears to have an Australian accent and slang.
So I chose it for both of those reasons - its similarities to Australia, and the association with exploration, as the continent Novindus was found across the "Endless Sea", which can be a metaphor for space.
As a side note, my exploration Asp Explorer is called Vingilot, which Tolkien fans will know the applicability of.