[https://science.nasa.gov/asset/hubble/comet-41p-reversal-animation/](https://science.nasa.gov/asset/hubble/comet-41p-reversal-animation/) even has a neat animation recreation of what might happened, the comet is so small that the gas inside once spelled had enough strenght to halt and change its momentum
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[https://science.nasa.gov/missions/hubble/nasas-hubble-detects-first-ever-spin-reversal-of-tiny-comet/](https://science.nasa.gov/missions/hubble/nasas-hubble-detects-first-ever-spin-reversal-of-tiny-comet/) seems like there is a reasonable non alien explanation for it
[https://science.nasa.gov/asset/hubble/comet-41p-reversal-animation/](https://science.nasa.gov/asset/hubble/comet-41p-reversal-animation/) even has a neat animation recreation of what might happened, the comet is so small that the gas inside once spelled had enough strenght to halt and change its momentum