# Hydrogen emission from comets 266P/Christensen or P/2008 Y2 (Gibbs) passing through the region.

> Disputed: Hydrogen emission from comets 266P/Christensen or P/2008 Y2 (Gibbs) passing through the region.

Source: https://mysteriesdept.com/mysteries/wow-signal/answers/ANS0CXZ4RJ42P8E/hydrogen-emission-from-comets-266p-christensen-or-p-2008-y2  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Wow! signal](https://mysteriesdept.com/mysteries/wow-signal)[What produced the Wow! signal?](https://mysteriesdept.com/mysteries/wow-signal/questions/QST0CXZ4P403VSY/what-produced-the-wow-signal)Answer

Answer · Wow! signal

# Hydrogen emission from comets 266P/Christensen or P/2008 Y2 (Gibbs) passing through the region.

Hydrogen emission from comets 266P/Christensen or P/2008 Y2 (Gibbs) passing through the region.

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

## Where it stands

**Disputed** None pieces of evidence for, three against. It needs two reviews to be accepted.

## What it predicts

- The comets' 1977 positions fall within the beam at the recorded time.
- Comets emit detectable narrowband 21-cm radiation at the required strength.
- A slowly moving comet would be seen in both horns.

## What would rule it out

- Ephemeris positions outside the beam, or absence of a cometary 21-cm emission mechanism.

## Evidence none for · 3 against

[A comet would have appeared in both horns; the signal appeared in one.](https://mysteriesdept.com/mysteries/wow-signal/evidence/EVD0CXZ4S9J2YQA/a-comet-would-have-appeared-in-both-horns-the-signal)

Established

AGAINST

[In 1977 the comets were about an hour of right ascension and three degrees of declination from the position,…](https://mysteriesdept.com/mysteries/wow-signal/evidence/EVD0CXZ4RSY0CPP/in-1977-the-comets-were-about-an-hour-of-right-ascension-and)

Established

AGAINST

[No mechanism for strong cometary 21-cm emission is known; a cometary hydrogen cloud would be degrees across,…](https://mysteriesdept.com/mysteries/wow-signal/evidence/EVD0CXZ4S1R0ZDZ/no-mechanism-for-strong-cometary-21-cm-emission-is-known-a)

Supported

AGAINST

## The questions it answers

[What produced the Wow! signal?](https://mysteriesdept.com/mysteries/wow-signal/questions/QST0CXZ4P403VSY/what-produced-the-wow-signal)

Open5 answers, none ahead

## Cite it

```
Mysteries Department. (2026). Hydrogen emission from comets 266P/Christensen or P/2008 Y2 (Gibbs) passing through the region. [Answer ANS0CXZ4RJ42P8E]. https://mysteriesdept.com/r/ANS0CXZ4RJ42P8E
```

Key

**ANS** 0CXZ4RJ42P8E

Kind

Answer · hypothesis

Origin

Published

Version

1

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