Hipparcos is a satellite launched by the European Space Agency in 1989 to measure the positions and distances of stars with high precision. It was the first space mission dedicated to astrometry, the branch of astronomy that deals with the measurement of celestial objects' positions and movements. The satellite collected data for over four years, resulting in a catalog of more than 118,000 stars. The Hipparcos mission significantly improved our understanding of stellar distances and motions, leading to advancements in various fields of astronomy. Its data has been used to refine the cosmic distance scale and has contributed to studies of stellar evolution and the structure of our galaxy, the Milky Way.