The Moon and her Sister.
Year 2249.
The Earth has two moons. This is common knowledge. First there was Luna; bright in the sky since time immemorial and revered by societies from ancient times through relatively recent history. The name given to this old moon is the one chosen by the ancient Romans.
Secondly there is Selene. Hanging in low-Earth orbit, less than a single percent of Luna but seeming nearly as large to the naked ey. . .