Galileo Galilei first pointed his new telescope towards Jupiter in January 1610 and immediately discovered the four major moons, Io, Europa, Ganymedes and Callisto.
(Galileo Galilei; pointed; his new telescope towards Jupiter; T:in January 1610; T:first) (Galileo Galilei; discovered; the four major moons; T:immediately)
Galileo Galilei Galileo Galilei
pointed discovered
his new telescope towards Jupiter T:in January 1610 T:first
the four major moons T:immediately