Space-based telescopes are telescopes that are placed in outer space to observe celestial objects and phenomena. These telescopes are used to overcome the limitations of Earth-based telescopes, such as atmospheric interference, light pollution, and limited viewing angles. Space-based telescopes offer several advantages, including the ability to observe fainter objects, higher resolution imaging, and access to wavelengths of light that are absorbed by Earth's atmosphere. They also provide a stable platform for long-duration observations and can detect phenomena that are not visible from Earth, such as gamma-ray bursts. Some of the most well-known space-based telescopes include the Hubble Space Telescope, Chandra X-ray Observatory, and the James Webb Space Telescope. These telescopes have provided groundbreaking discoveries in various fields of astronomy, including cosmology, exoplanet exploration, and the study of black holes. Overall, space-based telescopes have revolutionized our understanding of the universe and continue to push the boundaries of astronomical research.