... Nebula Nova Cygni Turns On . ... Old photographs show no evidence of the above nebula. ... Light flooded the local interstellar neighborhood, illuminated this existing gas cloud, excited the existing hydrogen, and hence caused the red emission. ... Here a very distant QSO happened to be placed right behind a massive galaxy. ... Our Solar System from Voyager . ... Nearby galaxy NGC 1317 shows such an unusual ring of star formation surrounding its barred nucleus. Comet Halley's Nucleus . ...