Astronomers Detect Radio Signals Directly From Planet 64 Light-Years Away
Astronomers have detected radio signals coming directly from a planet outside our Solar System for the first time, potentially opening a new way of studying the magnetic fields and internal properties of distant worlds. The signals were traced to Beta Pictoris b, a young gas giant located approximately 63 to 64 light-years from Earth in the Beta Pictoris system. The discovery was made using South Africa's MeerKAT radio telescope array.
The research team detected rapid, recurring and strongly circularly polarized bursts of radio emission, along with persistent radio signals, at frequencies ranging from about 0.85 to 3.5 gigahertz. By comparing the radio observations with precise astronomical reference points, the researchers were able to determine that the emission originated from Beta Pictoris b rather than its parent star. This distinction is important because previous radio detections from systems containing exoplanets could not conclusively determine whether the planet or its star was producing the emission.
Researchers believe the radio waves are produced by auroral activity associated with the planet's powerful magnetic field. On Earth, auroras occur when energetic charged particles interact with a planet's magnetic field and upper atmosphere, producing visible light. A similar process can generate radio waves when charged particles interact with a strong planetary magnetic field.
The observations also allowed scientists to estimate the strength of Beta Pictoris b's magnetic field. The researchers reported a minimum field strength of about 1.25 kilogauss at the location where the radio emission is produced. That makes the field far stronger than Earth's and substantially stronger than Jupiter's magnetic field, although the measurements describe the field at the radio-emission source rather than necessarily the planet's surface.
Beta Pictoris b is a massive and relatively young gas giant orbiting the star Beta Pictoris. The planetary system is around 63 light-years away and is known for its prominent disk of dust and debris. Because of its young age and large size, the planet provides astronomers with an opportunity to study how magnetic fields develop in giant planets early in their evolution.
The discovery does not represent evidence of extraterrestrial communication or alien technology. The radio signals are understood as a natural phenomenon produced by the interaction of energetic particles and the planet's magnetic environment. Instead, scientists say the significance of the finding lies in providing a new method for directly studying magnetic fields on worlds beyond the Solar System.
Magnetic fields are of particular interest to planetary scientists because they can influence how planets interact with radiation and stellar winds. On Earth, the magnetic field helps shield the atmosphere from charged particles emitted by the Sun. Studying magnetic fields on distant planets could therefore help scientists better understand planetary evolution and, eventually, the conditions that may allow some worlds to retain atmospheres suitable for life.
The findings were reported in a research preprint submitted in September 2026 and have not yet completed peer review. If independently confirmed, the observation would mark an important development in exoplanet science, giving astronomers a new tool for investigating the magnetic environments of planets that are otherwise extremely difficult to study directly.
