The Hobby-Eberly Telescope (HET) is a large optical telescope located at the McDonald Observatory in Texas, USA. It was commissioned in 1997 and is known for its unique design, featuring a fixed primary mirror that measures 10 meters in diameter. This design allows for efficient observation of celestial objects while minimizing costs. The telescope is primarily used for astronomical research, including studies of distant galaxies, stars, and exoplanets. It is equipped with advanced instruments that enable scientists to gather detailed data about the universe, contributing to our understanding of cosmic phenomena and the evolution of celestial bodies.