What was wrong with Hubble's mirror, and how was it fixed? | BBC Sky at Night Magazine
Hubble Space Telescope - Wikipedia
How NASA fixed Hubble's flawed vision - and reputation - CBS News
How NASA fixed Hubble's flawed vision - and reputation - CBS News
25 years later: Fixing the Hubble Space Telescope : News Center
Observatory - Optics | NASA
Hubble Celebrates 25 Years Since First Repair Mission in Space | NASA
Rogue light led to Hubble's crooked mirror | New Scientist
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
Some Feared Mirror Flaws Even Before Hubble Orbit - The New York Times
Hubble Trouble - How did the Space Telescope Mirror End Up Flawed ? - YouTube
History: The Spherical Aberration Problem | ESA/Hubble | ESA/Hubble
What was issue with the initial Hubble telescope mirror? - Quora
Corning, Kodak, and Hubble – The Pigeon Roost
The myopia in the Hubble space telescope | Points de Vue | International Review of Ophthalmic Optics
The First Picture From Hubble Was Heart-Breaking! - YouTube
The Hubble Space Telescope: concept, delay, embarrassment, despair, and finally – Jubilation, Part 2
25 years later: Fixing the Hubble Space Telescope : News Center
How NASA fixed Hubble's flawed vision - and reputation - CBS News