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The Vela Pulsar (PSR J0835-4510 or PSR B0833-45) is a radio, optical, X-ray- and gamma-emitting pulsar associated with the Vela Supernova Remnant in the constellation of Vela. First line of the Wikipedia entry on the Vela pulsar. It's obviously much more spread out and diffuse than the Crab nebula because it occurred more than 10 times as long ago. Here it ...


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This source, https://apod.nasa.gov/apod/ap190110.html, an astronomy Picture of the Day states that the Vela remnant "is likely embedded in a larger and older supernova remnant, the Gum Nebula".


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