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The Vela pulsar is a neutron star from a supernova that exploded 10,000 years ago. It spins 11 times a second. The Crab Nebula along with the central Crab Pulsar formed 1000 years ago. This pulsar spins 30 times a second. If there's a famous Crab Pulsar with a nebula, is there a Vela Nebula in which the Vela Pulsar is within?

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  • $\begingroup$ there's this pretty interesting looking thing, but experts will have to chime in on what is or isn't or can be or can't be considered an actual nebula commons.wikimedia.org/wiki/… $\endgroup$ – uhoh Nov 26 '20 at 2:20
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    $\begingroup$ @uhoh So there's a Vela Supernova Remnant $\endgroup$ – user random numbers Nov 26 '20 at 2:22
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    $\begingroup$ I didn't know until just now either! Unrelated factoid in HSM SE: Who first reported the Crab pulsar's pulsing but was dismissed by an astronomer? $\endgroup$ – uhoh Nov 26 '20 at 2:26
  • $\begingroup$ @uhoh Why was the Crab's pulsing originally dismissed by astronomers? $\endgroup$ – user random numbers Nov 26 '20 at 2:28
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    $\begingroup$ Have a look at the story described there, it's interesting... $\endgroup$ – uhoh Nov 26 '20 at 2:39
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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 is as an optical image, roughly 6 degrees across and almost entirely filled by the supernova remnant. (The arrow marks the position of the Vela pulsar, which is distinctly off-centre.)

Vela supernova remnant

The first picture on the Wikipedia page is

Vela PWN

which shows the pulsar wind nebula around the Vela pulsar. This again has an analogy with the Crab pulsar (and looks similar) and is due to the interaction of relativistic particles emitted by the pulsar with their surroundings and the strong magnetic fields. The picture is taken in X-rays and is only a few arcminutes across.

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  • $\begingroup$ @TypeIA That's because it IS the cloud-shaped outline that fills almost the whole image ! $\endgroup$ – ProfRob Nov 26 '20 at 13:42
  • $\begingroup$ Thanks for that clarification and for adding the note about the arrow. It is clear now, even to this amateur :-) $\endgroup$ – TypeIA Nov 26 '20 at 13:59
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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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    $\begingroup$ I didn't know that, thanks $\endgroup$ – user random numbers Nov 26 '20 at 4:43

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