Earth’s magnetic field protects life on our blue planet — and astronomers just found evidence of a magnetic field on a rocky exoplanet 12 light-years away.
On Earth, we often take our planet’s magnetic field for granted. It protects living creatures from the sun’s rays, draws compass needles north and even creates beautiful auroras. Other worlds in our solar system have magnetic fields too — but what about Earth-like planets around other stars? New research may have revealed a promising lead.
Recent observations from the Very Large Array (VLA) radio telescopes in New Mexico revealed evidence of a magnetic field on the rocky exoplanet YZ Ceti b, which orbits a star about 12 light-years away from Earth. This is the first possible detection of a magnetic field on a planet beyond our solar system, according to a study published April 3 in the journal Nature Astronomy (opens in new tab).
« This research shows not only that this particular rocky exoplanet likely has a magnetic field but provides a promising method to find more,” study author Joe Pesce (opens in new tab), director of the National Radio Astronomy Observatory (NRAO), said in a statement (opens in new tab).
Magnetic fields are particularly interesting to astronomers because they’re an important part of making a planet habitable. Without a magnetic field, energetic particles from a star can erode a planet’s atmosphere, stripping away the blanket of gas that can support life.
