Instead, the fact that the mirror had been ground so precisely to the wrong shape led to the design of new optical components with exactly the same error but in the opposite sense, to be added to the telescope at the servicing mission, effectively acting as "spectacles" to correct the spherical aberration.The first step was a precise characterization of the error in the main mirror.. 
Peter Gregory Obi (19 July, 1961) jẹ́ olóṣèlú ọmọ ilẹ̀ Nàìjíríà, ohun si Gómìnà ìpínlẹ̀ Anambra laarin ọdun 2006 si ọdun 2014.. 