From megwatzke https://twitter.com/megwatzke on Twitter: What's a pulsar? It's the dense, rotating core left behind after a giant star collapses. This is the Vela pulsar, which rotates faster than a helicopter rotor and shoots out jets about 70% the speed of light that @chandraxray sees. #space #science https://twitter.com/megwatzke/status/1243161851057201153/video/1 https://chirp.cooleysekula.net/attachment/64057