# Pioneer Venus Large Probe Neutral Mass Spectrometer data

> Mass spectra from the probe's descent through the clouds, in which Mogul and colleagues assign part of a signal at mass 34 near 51 km to phosphine.

Source: https://mysteriesdept.com/mysteries/venus-phosphine/artifacts/ART0CQY29CA2X42/pioneer-venus-large-probe-neutral-mass-spectrometer-data  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Mysteries](https://mysteriesdept.com/mysteries)[Phosphine in the clouds of Venus](https://mysteriesdept.com/mysteries/venus-phosphine)[Artifacts](https://mysteriesdept.com/mysteries/venus-phosphine#artifacts)Pioneer Venus Large Probe Neutral Mass Spectrometer data

**ART** 0CQY29CA2X42·Artifact · recording

# Pioneer Venus Large Probe Neutral Mass Spectrometer data

RecordingPublic domainRecorded during descent, 9 December 1978

[Cite]

**Not kept here.** This copy isn't ours to show. [See it where it's published](https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1978-078D-06).

Mass spectra from the probe's descent through the clouds, in which Mogul and colleagues assign part of a signal at mass 34 near 51 km to phosphine.

NASA, 1978. Public domain

## Copies 2

**Dataset** NASA · nssdc.gsfc.nasa.gov · 1978-12-09 · public-domain1 step from the original

[Where it's published](https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1978-078D-06)

**Document** Mogul, Limaye, Way and Cordova · doi.org · 2021 · publisher2 steps from the original

[Where it's published](https://doi.org/10.1029/2020gl091327)

## Sources 1

- [Venus' Mass Spectra Show Signs of Disequilibria in the Middle Clouds](https://mysteriesdept.com/sources/SRC0CQY1KD652Z5/venus-mass-spectra-show-signs-of-disequilibria-in-the-middle)_SRC_

## Cite it

```
Mysteries Department. (2026). Pioneer Venus Large Probe Neutral Mass Spectrometer data [Artifact ART0CQY29CA2X42]. https://mysteriesdept.com/r/ART0CQY29CA2X42
```

Key

**ART** 0CQY29CA2X42

Kind

Recording

Held by

NASA Space Science Data Coordinated Archive

Dated

recorded during descent, 9 December 1978; re-analysed 2021

Licence

public-domain

Part of

[Phosphine in the clouds of Venus](https://mysteriesdept.com/mysteries/venus-phosphine)

The record

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[JSON](https://mysteriesdept.com/api/v1/records/ART0CQY29CA2X42)