A new analysis of archival Hubble Space Telescope photos reveals that a peculiar comet slowed its spin before fully reversing its rotational direction via “outgassing” during a flyby of Earth in 2017.


A new analysis of archival Hubble Space Telescope photos reveals that a peculiar comet slowed its spin before fully reversing its rotational direction via “outgassing” during a flyby of Earth in 2017.