Ask the NASA Exoplanet Archive a question
In your own words, and see exactly how it was answered
AstroFetch turns a plain-language question into a real ADQL query, runs it against the archive, and shows you the query, the rows it returned, and a plot if you want one. It is not answering from memory: every number comes from the archive as it stands today, and you can re-run the query yourself.
For example
“Compare the radii of confirmed exoplanets discovered by the transit method vs radial velocity.”
→ writes the ADQL, runs it against
pscomppars, returns a sortable table you
can download as CSV, and draws the comparison plot.
To start
Accounts are free. Sign in with Google or ORCID, tell us briefly who you are, and a person reviews the request — normally within two business days. We email you when it is approved.
Welcome to AstroFetch
AI-Powered Astronomy Data Service
Ask questions about exoplanets in your own words. AstroFetch writes the ADQL, runs it against the NASA Exoplanet Archive, and helps you explore the results with plots and follow-up analysis, all in the same conversation.
Try asking
Click an example to use it as your first prompt, or type your own.
Quick tips
- One topic per chat. Start a new chat for each question or problem. Long conversations consume more context and tokens, which slows responses and dilutes accuracy.
- Be specific. "Stars within 30 pc with confirmed planets" beats "nearby planet hosts."
- Check the ADQL. AstroFetch shows the query it ran - column-name mismatches are the most common error mode.
- Download CSVs for anything you'd cite. Plots are illustrative; the CSV is the canonical artifact.
- Rate the responses. One- and two-star ratings with comments are especially valuable during the beta.