Artist’s animation of the pulsar PSR J1023+0038

This artist's animation shows the pulsar PSR J1023+0038 stealing gas from its companion star. This gas accumulates in a disc around the pulsar, slowly falls towards it, and is eventually expelled in a narrow jet. In addition, a wind of particles is blowing away from the pulsar, represented here by a cloud of tiny dots. This wind clashes with the infalling gas, heating it and making the system glow brightly in X-rays and ultraviolet and visible light. Eventually, blobs of this hot gas are expelled along the jet, and the pulsar returns to the initial, fainter state, repeating the cycle. This pulsar has been observed to switch incessantly between these two states every few seconds or minutes. Credit: ESO/M. Kornmesser