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The Icy Blue Wings of Hen 2-437
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Name: Hen 2-437
Description: Planetary Nebula
Position (J2000): RA 19hr 32m 57.56s Dec 26° 52' 43.20"
Constellation: Vulpecula
Visual magnitude: 15.0
Field of view: 1.16 x 0.81 arcminutes
Orientation: North is 170.2° right of vertical
Image Credit: ESA/Hubble & NASA, ack: Judy Schmidt
Release date: February 8, 2016
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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 3000 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 catalogue 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.