Michael Stipe of the band R.E.M. once sang, “If you believed they put a man on the moon,” part of the hit song “Man on the Moon.” With that line, the singer and lyricist was referring to conspiracy theories surrounding the history-making 1969 lunar landing. “Fly Me to the Moon,” the new movie starring Scarlett Johansson and Channing Tatum, deals directly with one of these specious speculations — the one suggesting the touchdown and moonwalk were staged.