Southern Ring Nebula Poster

This side-by-side comparison shows observations of the Southern Ring Nebula in near-infrared light, at left, and mid-infrared light, at right, from the James Webb Space Telescope. This scene was created by a white dwarf star - the remains of a star like our Sun after it shed its outer layers and stopped burning fuel though nuclear fusion. Those outer layers now form the ejected shells all along this view. In the Near-Infrared Camera (NIRCam) image, the white dwarf appears to the lower left of the bright, central star, partially hidden by a diffraction spike. The same star appears - but brighter, larger, and redder - in the Mid-Infrared Instrument (MIRI) image. This white dwarf star is cloaked in thick layers of dust, which make it appear larger. The brighter star in both images hasn't yet shed its layers. It closely orbits the dimmer white dwarf, helping to distribute what it's ejected. Over thousands of years and before it became a white dwarf, the star periodically ejected mass