A jet-like flow of material, detected in the vicinity of a dying star, supports a model in which such jets shape the gas cloud around the star into a bipolar nebula. The jet probably comes from an unseen companion star.
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Soker, N. The mystery companion. Nature 426, 236–237 (2003). https://doi.org/10.1038/426236a
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DOI: https://doi.org/10.1038/426236a