Agent Exoplanet


Use the Agent Exoplanet interface to measure changes in the brightness of a star as an orbiting exoplanet transits. Contribute measurements to the Agent Exoplanet community. Describe an exoplanet light curve and its relationship to the physical process causing it.


Work with Citizen Scientists around the world to analyze exoplanet transit data.


Have you ever wondered how astronomers discover planets orbiting stars outside our solar system? This activity takes you through the steps astronomers use when they study extrasolar planet transits.

Interactive exoplanet data


Agent Exoplanet is an interactive web project which lets you measure the brightness of a star with a transiting planet. As the planet goes between us and the star, the planet blocks some of the light from the star. We measure this dip in brightness and see a light curve. Properties of this light curve give us information about the planet's size, mass, orbital distance and orbital speed.

Start analyzing exoplanet data!

Classroom resources

Are you a teacher? Do you want to use Agent Exoplanet in your classroom lessons? These resources are designed to help you to integrate this project into your class.

Teacher's guide view Student worksheet view

Further reading

If you would like to know more about how stars evolve, please check out ourĀ SpaceBook pages about exrasolar planet transits.

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  • 12-16
  • 17-18
  • All ages


Type of Activity
  • Fun