Portal:Astronomy/Picture/Week 37 2006

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Image:Nebular knots in the Ring Nebula.jpg

The Ring Nebula is one of the best known planetary nebulae, and was formed probably a few thousand years ago when a Sun-like star shed its outer layers at the end of its life. Although the nebula appears smooth and regular from the ground, the higher optical resolution of the Hubble Space Telescope reveals intricate structure.

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