Mysteries Department
Sign inRequest access
3I/ATLASEvidence
Evidence · 3I/ATLAS

NASA: it looks and behaves like a comet

At its 19 November 2025 briefing, with images from more than a dozen spacecraft, NASA said 3I "looks and behaves like a comet".

Supported0

What it means

Openunchanged
Answer this evidence bears onA natural comet from another planetary system
Supports2 for, none against
Still possibleunchanged
What it implies
  1. The agency with the most observations treats it as a comet.For the key question: Is 3I/ATLAS a natural comet or a technological object?

Sources 2

Cite it

Mysteries Department. (2026). NASA: it looks and behaves like a comet [Evidence EVD0DFQ53VZEVM7]. https://mysteriesdept.com/r/EVD0DFQ53VZEVM7
Private beta Downloads are for beta members

We're in a private beta while we get things right. Everything here is free to read; downloading datasets, sources and code is open to members for now.

It takes a couple of minutes. We'll reply by email.