This is a time lapse built from Hubble Telescope images taken of the star V838 Monocerotis between 2002 and 2006. But it doesn’t show a supernova. Good old V838 didn’t explode. No.
V838 suddenly brightened, and we’re watching that burst of light pass through a relatively stationary cloud of dust, illuminating the cloud as it goes.
Click through this thumbnail to a beautiful rendering of the event, by Roberto Colombari: