# A fragment of a comet, largely ice, that vaporised completely.

> Most likely: A fragment of a comet, largely ice, that vaporised completely.

Source: https://mysteriesdept.com/mysteries/tunguska-event/answers/ANS0D4ECD6T0HRP/a-fragment-of-a-comet-largely-ice-that-vaporised-completely  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[1908 Tunguska event](https://mysteriesdept.com/mysteries/tunguska-event)[What kind of body, if any, caused the Tunguska explosion?](https://mysteriesdept.com/mysteries/tunguska-event/questions/QST0D4ECARP6DFM/what-kind-of-body-if-any-caused-the-tunguska-explosion)Answer

Answer · 1908 Tunguska event

# A fragment of a comet, largely ice, that vaporised completely.

A fragment of a comet, largely ice, that vaporised completely.

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

## Where it stands

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

## What it predicts

- No macroscopic fragments anywhere.
- Chemical signatures of cometary volatiles (ammonia, water) in 1908 layers.

## What would rule it out

- A stony or iron fragment, or entry models showing icy bodies cannot penetrate to 8.5 km.

## Evidence 2 for · 1 against

[An unexplained ammonium spike in Greenland ice at 1908 could be supplied by a comet.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECDPE00V2/an-unexplained-ammonium-spike-in-greenland-ice-at-1908-could)

Speculative

FOR

[Simulations show icy comets can also deliver the energy and burst height needed for the tree fall.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECDEM4ZDB/simulations-show-icy-comets-can-also-deliver-the-energy-and)

Supported

FOR

[Entry models have icy and carbonaceous bodies bursting higher than observed.](https://mysteriesdept.com/mysteries/tunguska-event/evidence/EVD0D4ECDY84X1J/entry-models-have-icy-and-carbonaceous-bodies-bursting)

Suggestive

AGAINST

## The questions it answers

[What kind of body, if any, caused the Tunguska explosion?](https://mysteriesdept.com/mysteries/tunguska-event/questions/QST0D4ECARP6DFM/what-kind-of-body-if-any-caused-the-tunguska-explosion)

Most likelyA stony asteroid some 50–80 m across that broke up and exploded about 8.5 km up

## Cite it

```
Mysteries Department. (2026). A fragment of a comet, largely ice, that vaporised completely. [Answer ANS0D4ECD6T0HRP]. https://mysteriesdept.com/r/ANS0D4ECD6T0HRP
```

Key

**ANS** 0D4ECD6T0HRP

Kind

Answer · hypothesis

Origin

Published

Version

1

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