 Here's a 2023 web image of the Crab Nebula. We're zooming into the pulsar at the center. A pulsar is a rapidly rotating neutron star. It produces a vast amount of synchrotron emissions. That's radiation produced from charged particles, circling magnetic field lines, at relativistic speeds. The radiation appears here as light blue smoke-like material throughout the majority of the Crab Nebula's interior. Of the Nebula's edges are cavernous filaments of dust and hot gas. It's made up of fractured material that was ejected at high speeds from the central star. Note the areas where the synchrotron emission seems to be pinched. This indicates that the pulsar is surrounded by a dense layer of gas and dust that slows down ejected matter that passes through it.