EarthSky | June s deep sky: Nebulae, a nova and more earthsky.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from earthsky.org Daily Mail and Mail on Sunday newspapers.
RARE NAKED-EYE NOVA Every 20 years or so, a thermonuclear explosion occurs on the surface of RS Oph, a white dwarf in the constellation Ophiuchus. This week it happened again. On Aug. 8th, the brightness of the tiny star increased 600-fold, from.