Comet 41P Halted Its Spin — Then Began Turning Backward
Lead: In 2017, as Comet 41P/Tuttle-Giacobini-Kresák neared the Sun, its rotation decelerated over weeks until the nucleus stopped spinning and then began rotating in the opposite direction. Astronomer David Jewitt (UCLA) analyzed Hubble Space Telescope images from that approach and reported the reversal in a recent arXiv preprint ahead of publication in The Astronomical Journal. … Read more