Using his telescope to make careful observations of the heavens, Galileo saw things no one had seen before such as the phases of Venus and the moons of Jupiter.
(things; had seen; T:before) (Galileo; saw; things no one had seen before such as the phases of Venus and the moons of Jupiter)
things Galileo
had seen saw
T:before
things no one had seen before such as the phases of Venus and the moons of Jupiter