fictional depiction of the moons of Mars
... that the first fictional depiction of the moons of Mars predates their discovery by a century and a half?
... that the first <b id="mwCKY"><a href="./Mars_in_fiction" id="mwCKc" rel="mw:WikiLink" title="Mars in fiction">fictional depiction of the moons of Mars</a></b> predates their discovery by a century and a half?