Tags: Star.
V603 Aquilae (or Nova Aquilae 1918) was a bright nova occurring in the constellation Aquila in 1918. It is a binary system composing of a white dwarf and donor low mass star in close orbit to the point of being only semidetached. The white dwarf sucks matter off its companion which has filled its Roche lobe onto its accretion disk and surface until the excess material is blown off in a thermonuclear event.