The correct answer is option 1: Galileo. Galileo Galilei, an Italian astronomer and physicist, was the first to observe the Milky Way Galaxy. In the early 17th century, using a telescope he built, Galileo pointed it towards the night sky and made numerous groundbreaking discoveries. He observed that the Milky Way appeared as a band of hazy light, composed of countless stars. This discovery challenged the prevailing belief of his time that the Milky Way was a celestial sphere of fixed stars. Galileo`s observations of the Milky Way were crucial in advancing our understanding of the structure and nature of our galaxy. His work laid the foundation for future astronomers and scientists to continue studying the Milky Way and unraveling its mysteries.