Album: Astro folder :)
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Hourglass Nebula
This snapshot of MyCn18, a young planetary nebula, reveals that the object has an hourglass shape with an intricate pattern of "etchings" in its walls. The results shed new light on the poorly understood ejection of stellar matter that accompanies the slow death of Sun-like stars. The hourglass shape may be produced by the expansion of a fast stellar wind within a slowly expanding cloud, which is denser near its equator than near its poles.
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