In 1609, using a homemade telescope that could magnify objects to 20 times the size seen by the naked eye, Galileo discovered four moons orbiting the planet Jupiter.
(a homemade telescope; could magnify; objects) (20 times the size; seen; by the naked eye) (Galileo; discovered; four moons orbiting the planet Jupiter; T:In 1609) (four moons; orbiting; the planet Jupiter)
a homemade telescope 20 times the size Galileo four moons
could magnify seen discovered orbiting
objects
by the naked eye
four moons orbiting the planet Jupiter T:In 1609
the planet Jupiter