My video clip
YouTube - changing spectrum of nova at outburst outlines the cause of a nova to appear in the sky and records its changing spectrum [V475 Scuti] via my telescope - the H-alpha line at 656nm typifies a nova but it only appears dominant a week after initial outburst. Comparison spectra with nova-like star V838 Mon famous for its lightshell recorded via Hubble ST - hope it's of interest
