Panel Finds Error by Manufacturer of Space Telescope - The New York Times
NASA Unveils Images From Repaired Hubble Telescope - The New York Times
What was wrong with Hubble's mirror, and how was it fixed? - BBC Sky at Night Magazine
The History of Hubble - NASA Science
What was wrong with Hubble's mirror, and how was it fixed? - BBC Sky at Night Magazine
Hubble's Mirror Flaw - NASA Science
The James Webb telescope had 344 'single point failures' before launch. Then, success - OPB
25 Years Later, Hubble Sees Beyond Troubled Start - The New York Times
The Hubble Space Telescope's amazing journey 25 years on | The Independent | The Independent
the difference a 2.2 micrometer defect can make. this is M100, as pictured by the Hubble Telescope before and after the problem was solved [x-post from r/pics] : r/space