# Short-lived dark spots that appear within half an hour, last a few hours and vanish.

> Still possible: Short-lived dark spots that appear within half an hour, last a few hours and vanish.

Source: https://mysteriesdept.com/mysteries/hd-139139-random-transiter/answers/ANS0D79S5FY6FRB/short-lived-dark-spots-that-appear-within-half-an-hour-last  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[HD 139139, the "Random Transiter"](https://mysteriesdept.com/mysteries/hd-139139-random-transiter)[If the dips are real, what causes them?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79S04202NJ/if-the-dips-are-real-what-causes-them)Answer

Answer · HD 139139, the "Random Transiter"

# Short-lived dark spots that appear within half an hour, last a few hours and vanish.

Short-lived dark spots that appear within half an hour, last a few hours and vanish.

**Still possible** Answers **1** questionPublished0

## Where it stands

**Still possible** Its tests haven't settled it: one piece of evidence for, none against. It needs two reviews to be accepted.

## What it predicts

- Dip depth depends on wavelength according to spot temperature.
- Similar events in other stars, now unrecognised.

## What would rule it out

- Colour-independent dips, or a physical argument that spots cannot form and dissolve so fast.

## Evidence 1 for · none against

[The authors find no physical law violated and note such events could have gone unnoticed in other stars.](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S5QR6MV6/the-authors-find-no-physical-law-violated-and-note-such)

Speculative

FOR

## The questions it answers

[If the dips are real, what causes them?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79S04202NJ/if-the-dips-are-real-what-causes-them)

Open7 answers, none ahead

## Cite it

```
Mysteries Department. (2026). Short-lived dark spots that appear within half an hour, last a few hours and vanish. [Answer ANS0D79S5FY6FRB]. https://mysteriesdept.com/r/ANS0D79S5FY6FRB
```

Key

**ANS** 0D79S5FY6FRB

Kind

Answer · hypothesis

Origin

Published

Version

1

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