The Hubble Space Telescope (HST) is indeed a large satellite, approximately the size of a school bus. Launched in 1990, it orbits Earth at an altitude of about 547 kilometers (about 340 miles). Hubble is equipped with large solar panels that provide the necessary power to operate its scientific instruments and systems.
The telescope has made significant contributions to astronomy by capturing high-resolution images and data across various wavelengths, including visible, ultraviolet, and near-infrared light. Its unique vantage point above the Earth's atmosphere allows it to observe celestial objects without atmospheric distortion, leading to groundbreaking discoveries in areas such as the expansion of the universe, the life cycle of stars, and the nature of exoplanets.
Hubble is one of the most important scientific tools in modern astronomy and continues to operate and provide valuable data, even as other space telescopes have been launched.