repair articles
By how much was the edge of the Hubble primary mirror ground too flat during manufacturing?
What optical phenomenon was caused by the mirror's incorrect shaping?
Which initial instrument was designed assuming perfect input from the primary mirror?
What was the primary cause of the failure to catch the mirror error during ground testing?
Which instrument served as the systemic, universal fix for the existing non-upgraded instruments?
How many precisely positioned mirrors did the COSTAR instrument contain?
When did the first Hubble Servicing Mission (SM1) launch to physically implement the fix?
Which instrument was designed with its own corrective optics built into its internal path, making it immune to the primary mirror flaw for its specific view?
Which instrument bay did the COSTAR unit slot into, replacing the original component?