Herein, we learn about radio telescopes, what they do, what their function is, and some of the major radio facilities around the world. We also examine angular resolution and the need for interferometry in radio telescopes. This is part of my intro Astronomy class taught at Willam Paterson University and CUNY Hunter. National Radio Astronomy Observatory (NRAO) Green Bank Observatory Arecibo Observatory Five-hundred-meter Aperture Spherical radio Telescope (FAST) Centaurus A recent news NRAO Very Large Array Filming 'Contact' at the VLA Radio Interferometry NRAO Very Long Baseline Array (VLBA) Event Horizon Telescope M87 using the Canada-France-Hawaii Telescope Black Hole-Powered Jet of Electrons and Sub-Atomic Particles Streams From Center of Galaxy M87 NRAO M87 with its jet.