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A spectacular (314Ј ϫ 4Ј) bipolar nebula, with a symmetric and rotating, high-velocity collimated outflow, with episodic outburst properties, has been discovered in the Cassiopeia-Cepheus region. A compact object classified as the planetary nebula KjPn 8 is located at the center of symmetry of this extraordinary nebula. The angular extent of this bipolar structure is now the largest one known associated with a planetary nebula (PN). A mosaic of H␣ images covering the full extent of the nebuladoi:10.1086/309801 fatcat:5bdr4cker5dn5ihxq6j7ph55si