Galilean Moons of Jupiter This is a HST "family portrait" of the four largest moons of Jupiter, first observed by Galileo nearly four centuries ago.
(This; is; a HST "family portrait" of the four largest moons of Jupiter) (the four largest moons of Jupiter; observed; by Galileo; T:nearly four centuries ago; T:first)
This the four largest moons of Jupiter
is observed
a HST "family portrait" of the four largest moons of Jupiter
by Galileo T:nearly four centuries ago T:first