Low-frequency radio astronomy

Low-frequency radio astronomy studies very long-wavelength radio waves, typically from 10 kHz to a few hundred MHz. These signals come from energetic cosmic phenomena like the early universe, pulsars, and cosmic magnetic fields. Because these wavelengths are so long, specialized large antennas or arrays are needed for detection. This field helps scientists explore the universe's origins, its large-scale structure, and extreme environments, providing insights that are not accessible through visible light astronomy. Observing at low frequencies often requires careful measures against Earth's ionosphere and radio interference, making it a challenging but revealing area of astronomy.