A stellar flyby with a 0.8 solar mass star at 110 au can simultaneously explain the orbital dynamics and colour distribution of trans-Neptunian objects, assuming an initial red-to-grey colour gradient in the primordial disc.
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TNO colours provide new evidence for a past close flyby of another star to the Solar System
A stellar flyby with a 0.8 solar mass star at 110 au can simultaneously explain the orbital dynamics and colour distribution of trans-Neptunian objects, assuming an initial red-to-grey colour gradient in the primordial disc.