Story summary (spoiler).
Our Sun, in its run around galaxy, has entered a vast cloud of generally harmless cosmic dust. No one knows how long the pass will take - decades or thousands of years.
Result is: much less heat of the Sun reaches earth. And earth has entered the process that will take it into the long forgotten ice age.
The story is about the anguish of a man who has seen his world shattered by the event.
The Forgotten Enemy, short story, review
Author: Arthur C Clarke
First Published: 1950
- "Transience" - where our Sun enters a more dangerous kind of cosmic cloud, a nebula.
- In Asimov's novel "Currents of Space", a floating cloud of carbon dust hits the sun of an inhabited planet, with disastrous effects.