Then almost 400 years ago, Galileo pointed his telescope at the heavens and a new era was opened as he made observations of the planets and particularly the moons of Jupiter.
(he; made; observations of the planets and particularly the moons of Jupiter) (Galileo; pointed; his telescope; at the heavens and a new era; T:Then; T:almost 400 years ago)
he Galileo
made pointed
observations of the planets and particularly the moons of Jupiter
his telescope at the heavens and a new era T:Then T:almost 400 years ago