Update astronomer database: 11,755 astronomers

README.md

@@ -3,12 +3,7 @@ license: cc0-1.0
 pretty_name: "Astronomer Database"
 language:
   - en
-description: >-
-  A comprehensive database of astronomers throughout history, sourced from Wikidata.
-  11,613 astronomers from 266 countries with fields of work,
-  awards, and employer history.
-size_categories:
-  - 10K<n<100K
+description: "A comprehensive database of astronomers throughout history, sourced from Wikidata.  From ancient stargazers to modern astrophysicists, this dataset captures the lives and work of astronomers across th"
 task_categories:
   - tabular-classification
 tags:
@@ -19,66 +14,75 @@ tags:
   - open-data
   - tabular-data
   - parquet
+size_categories:
+  - 10K<n<100K
 configs:
   - config_name: default
-    default: true
     data_files:
       - split: train
         path: data/astronomers.parquet
+    default: true
 ---
 
 # Astronomer Database
 
-*Part of the [Astronomy Datasets](https://huggingface.co/collections/juliensimon/astronomy-datasets-69c24caf2f17e36128946743) collection on Hugging Face.*
 
-Complete database of astronomers throughout history — **11,613** individuals
-from **266** countries, sourced from [Wikidata](https://www.wikidata.org/).
+<div align="center">
+  <img src="banner.jpg" alt="Blue Marble — high-definition image of Earth from space" width="400">
+  <p><em>Credit: NASA/GSFC/Suomi NPP</em></p>
+</div>
+
+
+*Part of a [dataset collection](https://huggingface.co/collections/juliensimon/space-essentials-69cbafd7ea046a10eff11405) on Hugging Face.*
 
 ## Dataset description
 
-From ancient stargazers to modern astrophysicists, this dataset captures the lives and
-work of astronomers across the ages. It spans from historical figures like Galileo Galilei
-and Johannes Kepler to contemporary researchers studying gravitational waves, exoplanets,
-and the large-scale structure of the universe.
+A comprehensive database of astronomers throughout history, sourced from Wikidata.
+
+From ancient stargazers to modern astrophysicists, this dataset captures the lives and work of astronomers across the ages. It spans from historical figures like Galileo Galilei and Johannes Kepler to contemporary researchers studying gravitational waves, exoplanets, and the large-scale structure of the universe.
+
+The dataset includes birth/death dates, sex, nationality, employer history (universities, observatories, research institutions), awards received (Nobel Prize, etc.), and fields of work (cosmology, planetary science, stellar physics, etc.). This enables historical analysis of the astronomy profession, diversity-in-STEM research, and bibliometric studies of scientific communities.
 
-The dataset includes birth/death dates, sex, nationality, employer history (universities,
-observatories, research institutions), awards received (Nobel Prize, etc.), and fields
-of work (cosmology, planetary science, stellar physics, etc.). This enables historical
-analysis of the astronomy profession, diversity-in-STEM research, and bibliometric studies
-of scientific communities.
+Sourced from Wikidata's structured knowledge base (property P106=Q11063 for occupation: astronomer), which is maintained by the Wikipedia/Wikidata community and updated continuously.
 
-Sourced from Wikidata's structured knowledge base (property P106=Q11063 for
-occupation: astronomer), which is maintained by the Wikipedia/Wikidata community
-and updated continuously.
+
+This dataset is suitable for **tabular classification** tasks.
 
 ## Schema
 
-| Column | Type | Description |
-|--------|------|-------------|
-| `wikidata_id` | string | Wikidata entity ID (e.g. Q935) |
-| `name` | string | Full name |
-| `birth_date` | string | Date of birth (YYYY-MM-DD) |
-| `death_date` | string | Date of death if deceased |
-| `sex` | string | Sex (male/female) |
-| `nationality` | string | Nationality |
-| `employers` | string | Employers, semicolon-separated (universities, observatories, institutes) |
-| `awards` | string | Awards received, semicolon-separated |
-| `fields_of_work` | string | Fields of work, semicolon-separated (e.g. astrophysics, cosmology) |
-| `birth_year` | int | Year of birth (derived) |
+| Column | Type | Description | Sample | Null % |
+|--------|------|-------------|--------|--------|
+| `wikidata_id` | str | Wikidata entity ID (e.g. 'Q935' for Galileo Galilei); resolves to https://www.wikidata.org/wiki/Q935 — links to full biographical and bibliographic data including publications, awards, and institutional affiliations | Q4540405 | 0.0% |
+| `name` | string | Full name in English as recorded in Wikidata (Latin transliteration for non-Latin scripts) | 'Abd al-'Aziz al-Wafa'i | 0.0% |
+| `birth_date` | str | Date of birth in ISO 8601 format (YYYY-MM-DD); null for ancient or medieval astronomers whose birth year is uncertain, and occasionally for modern astronomers with private records | 1408-01-01 | 23.3% |
+| `death_date` | str | Date of death in ISO 8601 format (YYYY-MM-DD); null for living astronomers | 1471-01-01 | 49.1% |
+| `sex` | string | Recorded biological sex; values: 'male', 'female'; null if not recorded in Wikidata | male | 4.6% |
+| `nationality` | string | Country of primary professional affiliation or citizenship (e.g. 'United States', 'Germany'); uses full English country name; may differ from country of birth | Egypt | 33.7% |
+| `employers` | string | Universities, observatories, and research institutes where the astronomer has worked, semicolon-separated (e.g. 'Harvard University; Smithsonian Astrophysical Observatory'); null if no employer is recorded in Wikidata | Harvard University | 54.5% |
+| `awards` | string | Honours and prizes received, semicolon-separated (e.g. 'Nobel Prize in Physics; Kavli Prize'); null if no awards are recorded in Wikidata | Presidential Early Career Award for S... | 79.0% |
+| `fields_of_work` | string | Primary research specializations, semicolon-separated (e.g. 'astrophysics; cosmology; stellar astronomy'); drawn from Wikidata property P101; null if not categorized | astronomy; mathematics | 74.1% |
+| `birth_year` | Int64 | Integer year extracted from birth_date; enables era-based filtering (e.g. pre-telescopic vs. modern) when full date is unavailable; null only if birth date is entirely unknown | 1408 | 24.1% |
 
 ## Quick stats
 
-- **11,613** astronomers from **266** countries
-- **9,685** male, **1,394** female
-- **3,025** with recorded fields of work
-- **2,466** with recorded awards
-- Top nationalities: United States (1,563), Germany (564), France (556), United Kingdom (360), Italy (280)
+- **11,755** astronomers from **268** countries
+- **9,789** male, **1,415** female
+- **3,043** with recorded fields of work
+- **2,473** with recorded awards
+- Top nationalities: United States (1,565), Germany (565), France (556), United Kingdom (362), Italy (280)
 
 ## Usage
 
 ```python
 from datasets import load_dataset
 
+ds = load_dataset("juliensimon/astronomer-database", split="train")
+df = ds.to_pandas()
+```
+
+```python
+from datasets import load_dataset
+
 ds = load_dataset("juliensimon/astronomer-database", split="train")
 df = ds.to_pandas()
 
@@ -97,47 +101,43 @@ print(f"{len(cosmologists):,} cosmologists")
 nobel = df[df["awards"].str.contains("Nobel", na=False)]
 print(f"{len(nobel):,} Nobel Prize recipients")
 
-# University affiliation
-cambridge = df[df["employers"].str.contains("Cambridge", na=False)]
-print(f"{len(cambridge):,} Cambridge-affiliated astronomers")
+# Era distribution
+import matplotlib.pyplot as plt
+df.dropna(subset=["birth_year"]).hist("birth_year", bins=50)
+plt.xlabel("Birth Year")
+plt.ylabel("Count")
+plt.title("Astronomers by Birth Year")
+plt.show()
 ```
 
 ## Data source
 
-[Wikidata](https://www.wikidata.org/) SPARQL endpoint. Astronomers identified via
-property P106 (occupation) = Q11063 (astronomer). Data is community-curated and
-updated continuously by Wikipedia editors worldwide.
-
-## Update schedule
-
-Quarterly (January, April, July, October). Re-run manually at any time to pick up new entries.
+https://www.wikidata.org/
 
 ## Related datasets
 
-- [astronaut-database](https://huggingface.co/datasets/juliensimon/astronaut-database) — Every person who has traveled to space
-- [observatory-database](https://huggingface.co/datasets/juliensimon/observatory-database) — Astronomical observatories worldwide
+- [juliensimon/astronaut-database](https://huggingface.co/datasets/juliensimon/astronaut-database)
 
-## Pipeline
+- [juliensimon/observatory-database](https://huggingface.co/datasets/juliensimon/observatory-database)
 
-Source code: [juliensimon/space-datasets](https://github.com/juliensimon/space-datasets)
+> If you find this dataset useful, please consider [giving it a like](https://huggingface.co/datasets/juliensimon/astronomer-database) on Hugging Face. It helps others discover it.
 
-## Support
+## About the author
 
-If you find this dataset useful, please give it a ❤️ on the [dataset page](https://huggingface.co/datasets/juliensimon/astronomer-database) and share feedback in the Community tab! Also consider giving a ⭐️ to the [space-datasets](https://github.com/juliensimon/space-datasets) repo.
+Created by [Julien Simon](https://julien.org) — AI Operating Partner at Fortino Capital. Part of the [Space Datasets](https://julien.org/datasets) collection.
 
 ## Citation
 
 ```bibtex
 @dataset{astronomer_database,
-  author = {Simon, Julien},
   title = {Astronomer Database},
+  author = {juliensimon},
   year = {2026},
-  publisher = {Hugging Face},
   url = {https://huggingface.co/datasets/juliensimon/astronomer-database},
-  note = {Sourced from Wikidata (CC0)}
+  publisher = {Hugging Face}
 }
 ```
 
 ## License
 
-[CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/) (Wikidata content is public domain)
+[CC0-1.0](https://creativecommons.org/licenses/by/4.0/)

data/astronomers.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:6cb0d89dd9354e00273e8e6b7b292a6c444e6d324496ac9b0c282c49a92b2f76
-size 432247
+oid sha256:92db515f91245fb66460aaefc33c1492ceb7265656f6d3d9abd056c24f83ca97
+size 436197