telescope - Where exactly is the modification that first corrected the spherical aberration in Hubble's primary mirror? - Astronomy Stack Exchange
Reflecting telescope - Wikipedia
Aligning the Primary Mirror Segments of NASA's Webb Telescope | NASA
Sensors | Free Full-Text | Design and Optimization for Mounting Primary Mirror with Reduced Sensitivity to Temperature Change in an Aerial Optoelectronic Sensor
How to Align Your Newtonian Reflector Telescope | Sky & Telescope - Sky & Telescope
Sub-aperture lens correctors for single-mirror telescopes
History: The Spherical Aberration Problem | ESA/Hubble | ESA/Hubble
The Hubble Space Telescope: concept, delay, embarrassment, despair, and finally – Jubilation, Part 2
EST secondary mirror: a key element for image correction
How to Align Your Newtonian Reflector Telescope | Sky & Telescope - Sky & Telescope
Hubble's Mirror Flaw | NASA
Parabolizing a Telescope Mirror
Corrective Optics Space Telescope Axial Replacement - Wikipedia
Observatory - Optics | NASA
What Problem Does Adaptive Optics Correct?- Oxford Instruments
The testing error that led to Hubble mirror fiasco | New Scientist
New way to make telescope mirrors could sharpen our view of the universe | News Releases | Optica
Telescope astigmatism
Why is the primary mirror in a telescope curved? - Quora
TESTING/CORRECTIONS – Astro Khan Telescope Making
Reflecting Telescopes | StarParty.com
What methods and instruments are used to test the optical perfection of convex (parabolic) secondary mirrors for telescopes? - Quora
Reflecting Telescope | Definition, Advantages & Disadvantages - Video & Lesson Transcript | Study.com
Testing Telescope Mirrors at the Chabot Space and Science Center
Two-mirror system with accurate spherical aberration correction. Here,... | Download Scientific Diagram
