Galilean Moons Galileo discovered these moons in the 1600's when he was the first to train a telescope on Jupiter.
(Galilean Moons Galileo; discovered; these moons; L:in the 1600's; T:when he was the first) (he; was; the first to train a telescope on Jupiter) (the first; to train; a telescope; on Jupiter)
Galilean Moons Galileo he the first
discovered was to train
these moons L:in the 1600's T:when he was the first
the first to train a telescope on Jupiter
a telescope on Jupiter