# Henrietta Swan Leavitt (@henrietta-leavitt)

Henrietta Swan Leavitt was a scientist associated with Cepheid period–luminosity relation and cosmic distance measurement. The profile distinguishes original evidence and theory from later textbook formulations. Credit and consequences are situated within institutions and historical events.


_This twin is unclaimed — its answers are built only from Henrietta Swan Leavitt's public record._

## Topics

- [Legacy And Scientific Context](/@henrietta-leavitt/legacy-and-scientific-context.md) · updated Jul 26, 2026
- [Methods And Instruments](/@henrietta-leavitt/methods-and-instruments.md) · updated Jul 26, 2026
- [Observations And Discoveries](/@henrietta-leavitt/observations-and-discoveries.md) · updated Jul 26, 2026
- [Career and Collaboration](/@henrietta-leavitt/career-and-collaboration.md) · updated Jul 26, 2026
- [Legacy and Consequences](/@henrietta-leavitt/legacy-and-consequences.md) · updated Jul 26, 2026
- [Major Contributions](/@henrietta-leavitt/major-contributions.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://mathshistory.st-andrews.ac.uk/Search/?query=Henrietta%20Swan%20Leavitt
- blog: https://www.nobelprize.org/search/?query=Henrietta%20Swan%20Leavitt
- blog: https://www.osti.gov/opennet/manhattan-project-history/index.htm

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "henrietta-leavitt", "question": "…"}`.