Exoplanet Catalog (NASA Exoplanet Archive)
Every confirmed exoplanet and its host star in one clean table - the authoritative NASA catalog, ready to use. The NASA Exoplanet Archive's composite-parameters table gives the best published value per planet across all studies; we query it and ship one fat, tidy row per planet: planet & host-star identity, discovery method/year/facility, orbital parameters (period, semi-major axis, eccentricity), physical parameters (radius & mass in Earth units, equilibrium temperature), stellar parameters (spectral type, temperature, radius, mass), distance and sky position. Updates as new planets are confirmed.
- Source
- NASA / Caltech
- Licence
- Redistributable open data
- Quality
- QC clean · 0 failures
- Format
- Apache Parquet + dictionary
Safe to train on
Built only from a named, redistributable official source under a documented open licence - not scraped web data. No copyright grey zone, no personal data. Ships machine-readable Croissant metadata (ML Commons - loads in Hugging Face / Kaggle / Google), an AI training-licence manifest documenting source, licence and provenance for your model's data governance, and a machine-readable data dictionary (drop it into an agent / RAG prompt so the model knows every column) - all inspectable before you buy.
What's included
- One fat row per confirmed exoplanet (~6,300) - planet + host star + orbit + physics
- Discovery method, year and facility; orbital period, semi-major axis, eccentricity
- Radius & mass (Earth units), equilibrium temperature; stellar temp/radius/mass/spectral type
- Distance (parsecs) + sky position (RA/Dec) - plot or join to star catalogs
- The maintained cut vs stale one-off Kaggle uploads; audiences: astronomy edu, vis apps, ML demos
- NASA/Caltech-IPAC - freely available, attribution requested
- Source: NASA Exoplanet Archive (Caltech/IPAC under contract with NASA)
Schema
| Column | Type | Description | Filled | Distinct |
|---|---|---|---|---|
| planet | str | Planet name (primary key) | 100.0% | 6,316 |
| host_star | str | Host star name | 100.0% | 4,732 |
| n_stars | int | Number of stars in the system | 100.0% | 4 |
| n_planets | int | Number of known planets in the system | 100.0% | 8 |
| discovery_method | str | Detection method (Transit, Radial Velocity, …) | 100.0% | 11 |
| discovery_year | int | Year of discovery | 100.0% | 34 |
| discovery_facility | str | Discovering facility / survey | 100.0% | 73 |
| orbital_period_days | float | Orbital period (days) | 94.6% | 5,960 |
| semi_major_axis_au | float | Semi-major axis (AU) | 93.2% | 3,566 |
| eccentricity | float | Orbital eccentricity | 83.3% | 613 |
| radius_earth | float | Planet radius (Earth radii) | 99.2% | 2,270 |
| mass_earth | float | Planet mass / best-mass (Earth masses) | 99.5% | 2,861 |
| equilibrium_temp_k | float | Equilibrium temperature (K) | 91.7% | 2,988 |
| star_spectral_type | str | Host-star spectral type | 37.0% | 331 |
| star_temp_k | float | Host-star effective temperature (K) | 95.3% | 2,417 |
| star_radius_sun | float | Host-star radius (solar radii) | 94.9% | 1,932 |
| star_mass_sun | float | Host-star mass (solar masses) | 99.9% | 1,229 |
| distance_pc | float | Distance to the system (parsecs) | 99.6% | 4,615 |
| ra_deg | float | Right ascension (degrees) | 100.0% | 4,729 |
| dec_deg | float | Declination (degrees) | 100.0% | 4,729 |
Sample & preview
Every purchase ships as Apache Parquet with a data dictionary and the full QC report. A free sample (first rows + schema) is downloadable here - confirm fit before you buy. Source: NASA / Caltech (redistributable open data; attribution passes through - see our Licence).
Don't trust screenshots - drop the sample into your notebook right now.
import pandas as pd df = pd.read_parquet("global-exoplanet-catalog_sample.parquet") df.info() # typed columns, gap-aware, ready to join⬇ Download free Parquet sample or CSV for Excel
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