Plerion - A supernova remnant, like the Crab Nebula, which has a filled center rather than being a shell
Plume - A rising column of gas over a hot region in the interior or atmosphere of a body ...
Crab-type remnants (also named plerions), which are named for the prototype - the Crab Nebula - are powered by a pulsar located at their center.
Crab-like remnants: These remnants (also called plerions) resemble the Crab Nebula (above right). These SNRs are similar to shell-type remnants, except that they contain a pulsar in the middle that blows out jets of very fast-moving material.
 See also: Crab Nebula, Supernova Remnant, Earth, Heat, Jupiter
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