The Star by Arthur C. Clarke

The Star by Arthur C. Clarke (Infinity, November 1955)1 consists of the chief astronomer of an expedition to an ancient supernova give an account of their completed mission. Their key discovery is that the solar system around the star was home to an advanced civilisation and, before the latter were destroyed, they managed to build a vault on the outermost planet of their system—a memorial to their species. This provides a wealth of information to the expedition.
The discovery also sees the chief astronomer—who is also a Jesuit—struggle with his religious faith from the very start of the story: why would God destroy a whole people in this way? Is this a question a religious person should even ask, etc.?
The story’s final twist (spoiler) comes when the expedition’s calculations reveal that the supernova was the star that shone over Bethlehem over two thousand years ago.
The brooding thoughts of the priest, which are set against the cosmic background of the supernova remnants, make this much more than what would otherwise be a clever gimmick story. That said, and however well done the character study, it is the surprise ending that provides most of the impact—and that’s obviously less effective on re-reading. Still, I wouldn’t quibble with this being described as one of the genre’s classics.
**** (Very good). 2,450 words.

1. This won the 1956 Hugo for Best Short Story (against what looks like a fairly weak list of finalists).