A global citizen science project that brings people together to monitor exoplanet transits and support the planning of ESA’s Ariel space mission.
Have access to a telescope? Contribute observations directly through ExoClock. If you don’t have observing equipment and would like guided training with remote telescopes, explore ExoClock Unlocked.
What ExoClock offers
Tools and resources
Access observing resources, data analysis tools, and guidance on the equipment you need to contribute.
Guidance and feedback
Receive support with your observations and data analysis, with submissions reviewed to help ensure reliable scientific results.
Bi-monthly newsletter
Stay informed about project news, observing priorities, scientific results, and opportunities to get involved.
Monthly online meetings
Connect with the team and fellow participants, ask questions, share experiences, and discuss the latest developments.
An annual in-person meeting
Meet the community, exchange ideas, and discuss the year’s most exciting astronomy news and discoveries.
A direct contribution to research
Submit observations to the ExoClock database to support exoplanet research and the planning of ESA’s Ariel space mission.
Recognition for your contributions
In keeping with our commitment to open science, every participant who successfully contributes data to ExoClock is recognised as a co-author on the resulting scientific papers.
A welcoming community
Learn alongside amateur astronomers, researchers, and other citizen scientists who share your curiosity about the Universe.
Impact by the Numbers
2,000+
members from all around the globe collaborating in our citizen science community.
30,000+
scientific measurements from ground-based telescopes globally.
620+
exoplanets tracked with highly precise, updated ephemerides, thanks to you.
Scientific Publications
The following ExoClock data-release publications bring together observations from our global community and recognise contributing observers as co-authors. Published in peer-reviewed astronomical journals, they reflect the community’s shared contribution to exoplanet research.
- ExoClock Project IV: A homogeneous catalogue of 620 updated exoplanet ephemerides.
- ExoClock Project III: 450 New Exoplanet Ephemerides from Ground and Space Observations.
- ExoClock Project II: A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides.
- ExoClock Project: An open platform for monitoring the ephemerides of Ariel targets with contributions from the public.
