Sextuple star system: "Nightfall" by Isaac Asimov, Robert Silverberg

"If the stars should appear one night in a thousand years, how would men believe and adore, and preserve for many generations the remembrance of the city of God which had been shown!"
In "Nightfall" by Isaac Asimov, Robert Silverberg
The story, of course, being about how it doesn't quite work out like that.
When I think about “Nightfall”, Byron’s “Darkness” comes to mind, always:
"I had a dream, which was not all a dream,
The bright sun was extinguish’d, and the stars
Did wander darkling in the eternal space,
Rayless, and pathless; and the icy earth
Swung blind and blackening in the moonless air.
Morn came and went—and came, and brought no day,
And men forgot their passions in the dread
Of this their desolation: and all hearts
Were chill’d into a selfish prayer for light:
And they did live by watchfires—and the thrones,
The palaces of crowned kings—the huts,
The habitations of all things which dwell,
Were burnt for beacons; cities were consumed,
And men were gathered round their blazing homes
To look once more into each other’s face...."
If you're into stuff like this, you can read the full review.