3I-Atlas is weird, really weird.

Interstellar visitors don’t usually act like this. 1I/‘Oumuamua showed no visible tail, tumbled with a pancake/cigar debate, and pulled a tiny “non-gravitational” acceleration. Now 3I/ATLAS shows up with its own head-scratchers. Dust? Ice? Hydrogen outgassing? Solar-sail vibes? Or just physics we haven’t modeled right yet?

- No-tail anomaly: why “comet” behavior didn’t show up like it should
- Shape + spin: pancake vs cigar, and why it matters for reflectivity
- Mystery speed boosts: outgassing… without the usual signatures?
- 3I/ATLAS: what’s similar, what’s different, what’s next
- The boring explanation vs the exciting one (you know the one)

We keep it evidence-first, fun, and open to debate. Drop your take: alien tech, exotic ice, or selection bias and bad priors?

- Comment: Alien or not—and why?
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Sources and further reading (public):
- Harvard/Smithsonian papers on 1I/‘Oumuamua dynamics
- Peer-reviewed analyses of non-gravitational acceleration mechanisms
- Survey pipelines and detection biases for interstellar objects