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That's Odd -- Butterfly-Shaped Planetary Nebulae Tend to be Mysteriously Aligned

09/15/2013 02:40AM

That's Odd -- Butterfly-Shaped Planetary Nebulae Tend to be Mysteriously Aligned

The final stage of life for a star like our Sun results in the star blowing its outer layers into the surrounding space, forming an object known as a planetary nebula. Planetary nebulae are created in a wide range of beautiful and striking shapes. One type, known as the Bipolar Planetary Nebulae, takes on a ghostly hourglass or butterfly shape around its parent star. Astronomers using ESO's New Technology Telescope (NTT) and the NASA/ESA Hubble Space Telescope have studied 130 planetary nebulae in the central bulge of our galaxy and have made a discovery that has them scratching their heads. It seems that butterfly-shaped planetary nebulae tend to be mysteriously aligned — a surprising result given their different histories and varied properties.


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