Free · How we found new worlds

Exoplanet Discovery Timeline for Kids

Travel from a 1992 discovery to newer worlds found by watching stars and shadows.

  • Clear, kid-friendly steps
  • Private in your browser
  • No signup

Worlds beyond our Sun

Travel through discovery time

Found in 1992

PSR 1257+12 c

Virgopulsar timing

It was one of the first planets confirmed outside our solar system.

Powered by Open Exoplanet Catalogue (curated subset), an open-source library available under MIT.

Three simple steps

How to use it

  1. Pick a real planet that circles a star beyond our Sun.
  2. Compare its size, year, heat, distance, or discovery date.
  3. Try another world and see how different it can be.

Private by default

Your words and choices stay in this browser tab. There are no accounts, uploads, ads, or trackers inside the tool. Close the tab and the working data is gone.