Translation:

97. It is He Who maketh the stars (as beacons) for you that ye may guide yourselves with their help through the dark spaces of land and sea: We detail Our Signs for people who know.

Notes (Tafseer)

922. See the last note. At sea, or in the deserts or forests, or "in fairy scenes forlorn," -whenever we sweep over wide spaces, it is the stars that act as our guides, just as the sun and moon have already been mentioned as our measures of time.