# Mostly molecular hydrogen ice, formed in a giant molecular cloud core.

> Disputed: Mostly molecular hydrogen ice, formed in a giant molecular cloud core.

Source: https://mysteriesdept.com/mysteries/oumuamua/answers/ANS0CSKCACW5ZD5/mostly-molecular-hydrogen-ice-formed-in-a-giant-molecular  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)[What was 'Oumuamua made of?](https://mysteriesdept.com/mysteries/oumuamua/questions/QST0CSKBZN458NQ/what-was-oumuamua-made-of)Answer

Answer · 1I/'Oumuamua

# Mostly molecular hydrogen ice, formed in a giant molecular cloud core.

Mostly molecular hydrogen ice, formed in a giant molecular cloud core.

**Disputed** Answers **1** questionPublished0

## Where it stands

**Disputed** One piece of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- The body was born in the last few hundred million years in a cold dense cloud.
- Its kinematics point to a young population.

## What would rule it out

- Proof that hydrogen ice cannot form or survive at this size (see Q-ACCEL).

## Evidence 1 for · 1 against

[Kinematics suggest an age of about 35 million years and a link to a young moving group.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCAMP21FT/kinematics-suggest-an-age-of-about-35-million-years-and-a)

Suggestive

FOR

[Starlight and collisions would destroy such a body before it could arrive.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCAWG6K3Z/starlight-and-collisions-would-destroy-such-a-body-before-it)

Supported

AGAINST

## The questions it answers

[What was 'Oumuamua made of?](https://mysteriesdept.com/mysteries/oumuamua/questions/QST0CSKBZN458NQ/what-was-oumuamua-made-of)

Most likelyAn ordinary comet-like planetesimal of water ice and dust under an insulating organic crust (with or without…

## Cite it

```
Mysteries Department. (2026). Mostly molecular hydrogen ice, formed in a giant molecular cloud core. [Answer ANS0CSKCACW5ZD5]. https://mysteriesdept.com/r/ANS0CSKCACW5ZD5
```

Key

**ANS** 0CSKCACW5ZD5

Kind

Answer · hypothesis

Origin

Published

Version

1

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