661 = Nitrogen? › Forums › Variable Stars › Nova in Perseus › 661 = Nitrogen? 28 November 2020 at 11:13 pm #583417 Tim HaymesParticipant A google search and a NASA paper “Taking apart the light” lists 661 nm as caused by Nitrogen. I dont know if this is a lab spectrum or “interstellar”. Will they be the same – or not i ask myself ? (Just a thought)
