Reply To: 3i anti-tail

[Nick James]

Denis,

This is worth a read:

https://sites.psu.edu/astrowright/2025/09/29/3i-atlass-anti-tail-isnt-unique/

After debunking a load of Loeb junk it explains that the anti-tail in this case is related to relatively massive dust grains that don’t get accelerated backwards into the tail. It references the famous LSST paper that has a zillion (I exaggerate slightly) authors:

https://arxiv.org/abs/2507.13409