NASA’s IXPE Releases Detailed Image of the Oldest Known Supernova Remnant

• March 27, 2026

NASA’s Imaging X-ray Polarimetry Explorer (IXPE) has recently provided new insights into the oldest known supernova remnant, SN 185. This remarkable stellar explosion occurred approximately 8,000 light-years away from Earth in the direction of the Alpha Centauri star system, the closest triple star system to the Sun.

Illuminating an Ancient Cosmic Event

Historical records, particularly those preserved by ancient Chinese astronomers, document a bright star explosion visible in Earth’s sky for about eight months during the year 185 AD. This event corresponds with the supernova known today as SN 185. IXPE’s advanced X-ray imaging and polarimetry capabilities have allowed scientists to capture an unprecedented ‘‘portrait’’ of this supernova remnant, revealing details about the physical processes shaping such cosmic phenomena over nearly two millennia.

The SN 185 remnant offers scientists a unique opportunity to study the aftermath of a supernova explosion dating back almost 1,840 years. By analyzing X-ray emissions and their polarization, IXPE helps researchers better understand the magnetic fields and particle acceleration mechanisms at work in the expanding debris left behind by the stellar blast.

Situated in the vicinity of Alpha Centauri, SN 185’s remnants lie in a region of space rich for study due to its relative proximity to our solar system. This proximity allows instruments like IXPE to gather more detailed data that contribute to the broader understanding of supernova evolution and their impact on the surrounding interstellar medium.

The new data from IXPE enhances the historical and scientific narrative surrounding one of the earliest observed supernovae, connecting ancient astronomical records with cutting-edge space technology and investigations. Continuing studies of SN 185 and similar distant remnants are expected to shed light on the lifecycle of stars and the dynamics of the universe’s most powerful explosions.

NASA’s IXPE telescope has captured a new detailed image of SN 185, the oldest recorded supernova remnant dating back to 185 AD.