NASA has mapped the magnetic field of a pulsar nicknamed the Lighthouse, confirming how high energy particles escape into the galaxy. The discovery came from the Imaging X ray Polarimetry Explorer, or IXPE, a space telescope launched in 2021.
A cosmic lighthouse in the sky
The Lighthouse pulsar sits about 1,600 light years from Earth in the constellation of the Southern Cross. It is a rapidly spinning neutron star, the crushed core of a massive star that exploded as a supernova. As it spins, it shoots beams of radiation across space like a lighthouse beam sweeping past a ship. When those beams point toward Earth, telescopes detect a regular pulse of X rays and radio waves.
How IXPE measured the invisible
IXPE is the first telescope designed to measure the polarization of X rays from cosmic sources. Polarization is the direction in which light waves vibrate. By measuring the polarization of X rays coming from the nebula around the Lighthouse pulsar, scientists could trace the shape and direction of its magnetic field. The nebula is a cloud of gas and particles blown outward by the pulsar's intense energy.
What the data revealed
The IXPE data showed that the magnetic field in the nebula is highly ordered and aligned in a specific direction. This alignment matches a long standing theory: high energy particles produced by the pulsar escape along the galaxy's own magnetic field lines. The particles stream away from the pulsar, following these invisible pathways through space. The finding confirms that the magnetic field of the nebula is not chaotic but structured, and that it funnels particles into the wider galaxy.
Why this matters locally
For astronomers in the United States and around the world, the result is a major step in understanding how neutron stars interact with their surroundings. The Lighthouse pulsar is one of the most studied objects in the sky, but its magnetic field had never been directly mapped before. The IXPE team, led by researchers at NASA and several universities, now has a tool to study other pulsars and their nebulae in the same way.
The mapping of the Lighthouse pulsar's magnetic field gives scientists a clearer picture of how the universe's most extreme objects shape the space around them. It also shows how particles accelerated to near light speed can travel vast distances, influencing the evolution of galaxies.
