Having successfully determined that the surface of the Moon would support the landing of the Apollo Lunar Module and subsequent astronaut moonwalks, the telescope was moved to the Mount Wilson Observatory where it was used for two decades by Caltech graduates.
(the telescope; was moved; to the Mount Wilson Observatory) (it; was used; T:for two decades; by Caltech graduates)
the telescope it
was moved was used
to the Mount Wilson Observatory
T:for two decades by Caltech graduates