Topic Tag: supernovae Search for: › Forums › Topic Tag: supernovae Viewing topic 1 (of 1 total) Topic Voices Posts Last Post Why do only Type 1a supernovae have Silicon absorption lines in their spectra? Started by: John Coffin in: Spectroscopy 2 2 3 hours, 44 minutes ago Robin Leadbeater Viewing topic 1 (of 1 total)