In this #cosmic snapshot, the spectacularly #symmetrical wings of #Hen 2-437 show up in a #magnificent icy blue hue. Hen 2-437 is a planetary nebula, one of around 3,000 such objects known to reside within the Milky Way.
Located within the faint northern #constellation of Vulpecula (The Fox), Hen 2-437 was first identified in 1946 by Rudolph Minkowski, who later also discovered the famous and equally #beautiful M2-9 (otherwise known as the Twin Jet Nebula). Hen 2-437 was added to a catalog of planetary nebula over two decades later by astronomer and NASA astronaut Karl Gordon Henize.
Planetary #nebulae such as Hen 2-437 form when an aging low-mass star — such as the sun — reaches the final stages of life. The star swells to become a red #giant, before casting off its #gaseous outer layers into space. The star itself then slowly shrinks to form a white dwarf, while the expelled gas is slowly compressed and pushed outwards by #stellar winds. As shown by its remarkably beautiful appearance, Hen 2-437 is a bipolar #nebula — the material ejected by the dying star has streamed out into #space to create the two #icy blue lobes pictured here.