Galileo spacecraft launch, October 18. On this date in 1989, NASA launched the Galileo spacecraft from Kennedy Space Center in Florida. The mission was designed to study the planet Jupiter and its moons, marking one of the most significant space exploration projects of the 1990s. Galileo became the first spacecraft to enter orbit around Jupiter and transmitted unprecedented information about the planet and its moons, including Europa, Ganymede, and Io. The spacecraft collected more than 3,400 images and valuable scientific data, playing a crucial role in expanding human knowledge of the solar system. This observance was designated in the Gregorian calendar in 1989 by scientific and educational institutions because of its scientific and technological importance, symbolizing human progress in space exploration. In Iran, the day is typically marked by the publication of scientific materials and educational programs in academic and scientific institutions.