The Triple-Ring Nebula Around SN 1987A
(Morris and Podsiadlowki)

The progenitor of SN 1987A

          Ejection during the merger phase
(click on the image to see a movie of the simulation)

       

 Sweeping up in the blue-supergiant phase
(click on the image to see a movie of the simulation)

                  
Simulation (Sam Geen): Flying Through the Rings