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Published online by Cambridge University Press: 06 October 2025
Classical and recurrent novae are luminous eruptions taking place in binary star systems in which a white dwarf accretes material from a non-degenerate stellar companion. After the nova event, a shell of gas is expelled and expands into the surrounding environment at hundreds to thousands of km s−1. This shell, the so-called nova remnant, experiences interactions with the binary system, the accretion disk, the surrounding environment, and very notably with continuous winds from the white dwarf powered by radiation from nuclear burning on its surface. The similarities with the formation of planetary nebulae are obvious, yet the shaping of nova remnants occurs on much shorter time-scales. This results in the prevalent round to mild elliptical 3D shape of nova remnants. Here we describe the morphology, kinematics and dynamics of nova remnants based on our multi-epoch imaging and long-slit and integral field spectroscopic studies and compare them with those of planetary nebulae.