The fourth servicing mission (SM-4)
for the Hubble Space Telescope
(HST) offered an impressive and
unprecedented set of advanced technologies
that may yield the most remarkable
discoveries and imaging to date of
Earth, the solar system, and beyond. The
mission was, according to Deputy
Associate Director for the HST
Development Project Frank Cepollina,
“the most complicated mission – from a
servicing perspective – that NASA has
ever flown.”