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danielravennest t1_je6fqtg wrote on March 29, 2023 at 7:15 PM

Reply to comment by SpectralMagic in Webb telescope finds a 'hot Jupiter' exoplanet that defies expectations by maki23

Even low-grade hobby telescopes are polished to 1/16 micron (2.5 millionths of an inch). Serious telescopes are several times more accurate. Optics inherently have to be very precise.