Using more than 15 years of observations from the Parkes radio telescope, astronomers detected three rotational glitches in the pulsar PSR J1637−4642—a young neutron star that had shown no signs of glitches since its discovery. The three glitches included one that changed its rotation rate by ne arly 3 parts per million. Their paper was posted to the arXiv preprint server on Aug. 20. It has been accepted for publication in the Astrophysical Journal Letters. ...read more read less