NASA study reveals new details about ancient supernova

​Scientists have discovered new details about a 2,000-year-old supernova with the help of a NASA mission. The study focused on a supernova remnant called RCW 86, observed by astronomers for years.

Earlier observations by NASA’s Chandra X-ray Observatory showed that RCW 86 is surrounded by a large, low-density cavity. This space around the supernova allowed it to expand much faster than usual after the explosion. Researchers believe this unusual environment is the reason behind the supernova’s unique shape.

The latest study, NASA’s Imaging X-ray Polarimetry Explorer (IXPE) examined the outer region of RCW 86. The new observations revealed that once the expanding material reached the edge of the cavity, it started slowing down. This created a “reflected shock” effect, where energy bounced back toward the centre, adding a new layer of understanding to how the supernova evolved over time.

​To get a clearer picture, scientists combined data from multiple telescopes. The final image includes observations from IXPE, NASA’s Chandra X-ray Observatory, and the European Space Agency’s XMM-Newton. In the image, different colors represent different energy levels of X-rays—yellow for lower energy and blue for higher energy emissions.

The research was further supported by observations from the National Optical-Infrared Astronomy Research Laboratory under the National Science Foundation.

This new research helps scientists better understand how supernovae behave and evolve, especially when they interact with their surroundings in space.