Explore the fascinating world of telescopes in this comprehensive video series on astronomy. Delve into the hidden universe, learn about light diffraction, and understand the principles behind refracting and reflecting telescopes. Discover how to calculate resolutions of lunar craters, explore the limitations of various telescope types, and understand the impact of atmospheric conditions on observations. Gain insights into advanced technologies like adaptive optics, interferometry, and CCDs that have revolutionized astronomical observations. Investigate different types of telescopes, including radio telescopes and the Very Large Array. Examine the optical and radio windows in astronomy, and explore specialized fields such as infrared and X-ray astronomy. This in-depth series provides a thorough understanding of telescope technology and its applications in modern astronomical research.