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The Galactic Halo, extending beyond the visible Milky Way, can be studied in radio waves through the Bremsstrahlung of free electrons interacting with the galactic magnetic field and through the detection of fast radio bursts (FRBs).

The Galactic Center emits strong radio waves, suggesting the presence of an active galactic nucleus with a supermassive black hole, called Sagittarius A*. This region is key to understanding the gravitational dynamics of our galaxy.

Molecular Clouds, regions of high-density gas, are observed in radio frequencies through the emission of molecules like CO. They are pivotal in the process of star formation within the galaxy.

The Galactic Bulge is detected in radio wavelengths due to the emission from dense gas and dust, pulsars, and other compact objects. It houses older stars and can be studied to understand the early formation phases of the Milky Way.

The Magellanic Stream, a trail of gas extending from the Magellanic Clouds, emits radio waves particularly from the neutral hydrogen 21cm line, providing insights into interactions between our galaxy and these small, neighboring galaxies.

Radio Arcs are filamentary structures near the Galactic Center that emit radio waves; believed to be formed by magnetic field interactions. Their morphology and polarization provide information about the galactic magnetic fields.

The Galactic Disk is rich with molecular clouds and HII regions that are visible in radio frequencies. The spiral arms, where star formation occurs, can be traced in the disk using the 21cm hydrogen line.

Sagittarius A* is a bright and very compact radio source at the center of the Milky Way, which corresponds to the galaxy's supermassive black hole. Radio observations have provided evidence for its mass and the accretion activity.

Supernova Remnants, such as the Crab Nebula, emit strong radio waves due to synchrotron radiation, created when charged particles accelerate in magnetic fields. These remnants contribute to the understanding of the life cycle of stars.