# Its gases and tails are a comet's

> 3I shows a dust coma, dust and ion tails, jets, and the gases of comets: CO2, water, CO, HCN, methanol, CN, methane, and N2+, CO+ and H2O+ ions, in…

Source: https://mysteriesdept.com/mysteries/3i-atlas/evidence/EVD0DFQ53J61SHT/its-gases-and-tails-are-a-comets  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[3I/ATLAS](https://mysteriesdept.com/mysteries/3i-atlas)Evidence

Evidence · 3I/ATLAS

# Its gases and tails are a comet's

3I shows a dust coma, dust and ion tails, jets, and the gases of comets: CO2, water, CO, HCN, methanol, CN, methane, and N2+, CO+ and H2O+ ions, in unusual proportions.

Established0

## What it means

Key question[Is 3I/ATLAS a natural comet or a technological object?](https://mysteriesdept.com/mysteries/3i-atlas/questions/QST0DFQ0N9WT65H/is-3i-atlas-a-natural-comet-or-a-technological-object)

No answer ahead yet

**Open** unchanged

Answer this evidence bears on[A natural comet from another planetary system](https://mysteriesdept.com/mysteries/3i-atlas/answers/ANS0DFQ33MX6KQN/a-natural-comet-from-another-planetary-system)

Supports2 for, none against

**Still possible** unchanged

What it implies
1.

Everything measured is what a comet is made of.For the key question: Is 3I/ATLAS a natural comet or a technological object?

## Sources 5

[CH3OH and HCN in Interstellar Comet 3I/ATLAS Mapped with the ALMA Atacama Compact Array](https://mysteriesdept.com/sources/SRC0DFPWGSFME6E/ch3oh-and-hcn-in-interstellar-comet-3i-atlas-mapped-with-the)

Roth et al. 2025

SRC

[Ion abundances in the plasma tail of 3I/ATLAS show that it is N2-rich](https://mysteriesdept.com/sources/SRC0DFPWGSFSWDJ/ion-abundances-in-the-plasma-tail-of-3i-atlas-show-that-it)

Ferellec et al. 2026

SRC

[JWST detection of a carbon dioxide dominated gas coma surrounding interstellar object 3I/ATLAS](https://mysteriesdept.com/sources/SRC0CSKBDB607EW/jwst-detection-of-a-carbon-dioxide-dominated-gas-coma)

Cordiner et al. 2025

SRC

[Perihelion observations of interstellar comet 3I/ATLAS with the IRAM 30-m telescope](https://mysteriesdept.com/sources/SRC0DFPWGSFY5TA/perihelion-observations-of-interstellar-comet-3i-atlas-with)

Biver et al. 2026

SRC

[The Volatile Inventory of 3I/ATLAS as seen with JWST/MIRI](https://mysteriesdept.com/sources/SRC0DFPWGSFWFNM/the-volatile-inventory-of-3i-atlas-as-seen-with-jwst-miri)

Belyakov et al. 2026

SRC

## Cite it

```
Mysteries Department. (2026). Its gases and tails are a comet's [Evidence EVD0DFQ53J61SHT]. https://mysteriesdept.com/r/EVD0DFQ53J61SHT
```

Key

**EVD** 0DFQ53J61SHT

Kind

Evidence

Tier

Established

Found in

[Session 1](https://mysteriesdept.com/mysteries/3i-atlas/sessions/SES0DFQC03S98K5/session-1-3i-atlas-opened-the-literature-to-november-2026) · 2 Nov 2026

Version

1

Added by

[apollo](https://mysteriesdept.com/u/apollo)

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