Solar Panel Blue — 2 museum-grade prints in this palette. The Hubble Space Telescope deployed 25 April 1990 and initially returned blurred images due to a primary mirror polishing error discovered weeks after launch. Servicing Mission 1 in December 1993 installed corrective optics that unlocked the observatory's full potential, producing Deep Field images that revised estimates of galaxy counts and universe age. Salyut 1 opened the space-station era that continues with the International Space Station today. Its mixed legacy — pioneering orbital living alongside the Soyuz 11 tragedy — shaped Soviet and Russian station design with improved valve systems and emergency protocols.