# A dense, dry rocky or metal-rich body with no significant ice.

> Disputed: A dense, dry rocky or metal-rich body with no significant ice.

Source: https://mysteriesdept.com/mysteries/oumuamua/answers/ANS0CSKCCK66HF0/a-dense-dry-rocky-or-metal-rich-body-with-no-significant-ice  
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

# A dense, dry rocky or metal-rich body with no significant ice.

A dense, dry rocky or metal-rich body with no significant ice.

**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

- No volatile activity at any distance; the push needs a non-outgassing cause.

## What would rule it out

- The acceleration, which a dense dry body cannot produce by any mechanism tested (see Q-ACCEL).

## Evidence 1 for · 1 against

[The discovery-era interpretation was a dense, possibly rocky or metal-rich body lacking water or ice.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCCV03T2S/the-discovery-era-interpretation-was-a-dense-possibly-rocky)

Speculative

FOR

[Radiation pressure on an ordinary rocky body is far too weak to give the measured acceleration.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCD2T4S3Y/radiation-pressure-on-an-ordinary-rocky-body-is-far-too-weak)

Established

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). A dense, dry rocky or metal-rich body with no significant ice. [Answer ANS0CSKCCK66HF0]. https://mysteriesdept.com/r/ANS0CSKCCK66HF0
```

Key

**ANS** 0CSKCCK66HF0

Kind

Answer · hypothesis

Origin

Published

Version

1

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