renowned supernovae, SN 1987A (Supernova 1987A). determination method or standard: SHA-1 described at URL: https://esawebb.org/images/SN1987a-2 URL: https://esawebb...
renowned supernovae, SN 1987A (Supernova 1987A). determination method: SHA-1 described at URL: https://esawebb.org/images/SN1987a-2 URL: https://cdn.esawebb...
_(SN1987a-2).jpg){kind=link}