Radio Astronomy is the branch of astronomy dealing with the observation and analysis Radio waves from astronomical sources. Radio offers somewhat independent information from sources, and the Frequency range includes Atmospheric Windows, offering observation not readily available across Electromagnetic Radiation (EMR), and adapts easily to Interferometry such as Very-long-baseline Interferometry (VLBI) (including Earth-sized VLBI) which gives it a very high Angular Resolution.
Organizations dedicated to Radio Astronomy include:
Institut de radioastronomie millimétrique (IRAM)
Low-Frequency Array (LOFAR)
Max Planck Institute for Radio Astronomy (MPIR)
National Radio Astronomy Observatory (NRAO)
Position-Position-Velocity Space (PPV)
Texas Survey of Radio Sources at 365 MHz (TXS)