Update NASA EVA chronology: 375 records

README.md

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+---
+license: cc-by-4.0
+pretty_name: "NASA EVA Chronology"
+language:
+  - en
+description: >-
+  Complete chronology of extravehicular activities (spacewalks) by NASA and
+  Roscosmos.  375 EVAs from 1965 to 2013, including crew,
+  vehicle, duration, and purpose.
+size_categories:
+  - n<1K
+task_categories:
+  - tabular-classification
+tags:
+  - space
+  - eva
+  - spacewalk
+  - nasa
+  - iss
+  - human-spaceflight
+  - open-data
+  - tabular-data
+configs:
+  - config_name: default
+    data_files:
+      - split: train
+        path: data/eva.parquet
+---
+
+# NASA EVA Chronology
+
+*Part of the [Astronomy Datasets](https://huggingface.co/collections/juliensimon/astronomy-datasets-69c24caf2f17e36128946743) collection on Hugging Face.*
+
+Complete chronology of all **375** extravehicular activities (spacewalks)
+performed by NASA and Roscosmos astronauts and cosmonauts, from **1965**
+to **2013** -- totalling **1,987** crew-hours outside the
+spacecraft.
+
+## Dataset description
+
+This dataset contains the official NASA EVA chronology covering every
+spacewalk by US and Russian crews.  Each record includes the EVA sequence
+number, date, crew members, vehicle (Gemini, Apollo, Skylab, Shuttle, ISS,
+etc.), duration in H:MM format plus a computed `duration_minutes` column, and
+a free-text description of the purpose and activities.
+
+## Schema
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `eva_number` | Int64 | Sequential EVA number |
+| `country` | string | Country (USA / Russia) |
+| `crew` | string | Crew member(s) |
+| `vehicle` | string | Spacecraft or station (Gemini, Apollo, ISS, etc.) |
+| `date` | datetime | Date of EVA |
+| `duration` | string | Duration in H:MM format |
+| `duration_minutes` | float64 | Duration in total minutes |
+| `purpose` | string | Free-text description of EVA activities |
+
+## Quick stats
+
+- **375** EVAs (236 USA, 139 Russia)
+- **1965** to **2013**
+- **1,987** total crew-hours
+- **151** vehicles: Soyuz TM-26 Mir 24 (7), Soyuz TM-27 Mir 25 (6), Soyuz T-10 Salyut 7 (6), Soyuz TM-12 Mir (6), Apollo 15 (6)
+
+## Usage
+
+```python
+from datasets import load_dataset
+
+ds = load_dataset("juliensimon/nasa-eva-chronology", split="train")
+df = ds.to_pandas()
+
+# EVAs per vehicle
+print(df["vehicle"].value_counts())
+
+# Total spacewalk hours by country
+by_country = df.groupby("country")["duration_minutes"].sum() / 60
+print(by_country)
+
+# Longest EVAs
+longest = df.nlargest(10, "duration_minutes")[["date", "crew", "vehicle", "duration"]]
+print(longest)
+```
+
+## Data source
+
+NASA Open Data Portal -- Extra-vehicular Activity (EVA) - US and Russia.
+[data.nasa.gov](https://data.nasa.gov/dataset/extra-vehicular-activity-eva-us-and-russia)
+
+## Related datasets
+
+- [astronaut-database](https://huggingface.co/datasets/juliensimon/astronaut-database) -- Complete astronaut database
+- [launch-log](https://huggingface.co/datasets/juliensimon/launch-log) -- McDowell launch log
+
+## Pipeline
+
+Source code: [juliensimon/space-datasets](https://github.com/juliensimon/space-datasets)
+
+## Citation
+
+```bibtex
+@dataset{nasa_eva_chronology,
+  author = {Simon, Julien},
+  title = {NASA EVA Chronology},
+  year = {2026},
+  publisher = {Hugging Face},
+  url = {https://huggingface.co/datasets/juliensimon/nasa-eva-chronology},
+  note = {Based on NASA Open Data Portal EVA dataset}
+}
+```
+
+## License
+
+[CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/)

data/eva.parquet

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