…continuing from a prior post (and another):
Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2507.07312
[Submitted on 9 Jul 2025 (v1). last revised 12 Jul 2025 (this version, v2)]
X-SHOOTER Spectrum of Comet C/2025 N1: Insights into a Distant Interstellar Visitor
Alvarez-Candal, A. Rizos, J. L. Lara, L M. et al.
arxiv.org/abs/2507.08111
[Submitted on 10 Jul 2025]
The Kinematic Age of 3l/ATLAS and its Implications for Early Planet Formation
Taylor, A. G. Seligman, D. Z.
All the caveats still apply: arXiv.org is not a peer-reviewed science journal, these two papers have not been through a full peer review, and everything is to be taken with hefty grains of salt. In the case of Alvarez-Candal et al., their work is pretty straightforward observation and reporting. I, personally, doubt there’s much to be disputed here. If there’s an issue, it’s likely a slipup or oversight on their part, not something deep.
Taylor Seligman is a bit more complicated. Rather than direct deduction, they try to imply broader meaning from 3I/ATLAS. You can read the paper yourself, and decide if their implications on the broader field of astrophysics are justified by looking at ATLAS.