# Ejected from another star's planetary system during planet formation, like most interstellar objects should…

> Most likely: Ejected from another star's planetary system during planet formation, like most interstellar objects should be.

Source: https://mysteriesdept.com/mysteries/oumuamua/answers/ANS0CSKCGG662S6/ejected-from-another-stars-planetary-system-during-planet  
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)[Where did 'Oumuamua come from?](https://mysteriesdept.com/mysteries/oumuamua/questions/QST0CSKC04R56X5/where-did-oumuamua-come-from)Answer

Answer · 1I/'Oumuamua

# Ejected from another star's planetary system during planet formation, like most interstellar objects should…

Ejected from another star's planetary system during planet formation, like most interstellar objects should be.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests supported it: one piece of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- Interstellar objects are mostly comet-like planetesimals from protoplanetary discs.

## What would rule it out

- A population number density far above what disc ejection can supply.

## Evidence 1 for · 1 against

[The ISSI review explains every property by analogy with planetary-system evolution.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCGR04QRZ/the-issi-review-explains-every-property-by-analogy-with)

Supported

FOR

[The implied number of such bodies is in tension with ejection from protostellar discs in the candidate source…](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCGZT4M0Q/the-implied-number-of-such-bodies-is-in-tension-with)

Suggestive

AGAINST

## The questions it answers

[Where did 'Oumuamua come from?](https://mysteriesdept.com/mysteries/oumuamua/questions/QST0CSKC04R56X5/where-did-oumuamua-come-from)

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

Most likelyEjected from another star's planetary system during planet formation, like most interstellar objects should…

## Cite it

```
Mysteries Department. (2026). Ejected from another star's planetary system during planet formation, like most interstellar objects should… [Answer ANS0CSKCGG662S6]. https://mysteriesdept.com/r/ANS0CSKCGG662S6
```

Key

**ANS** 0CSKCGG662S6

Kind

Answer · hypothesis

Origin

Published

Version

1

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