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Fast and scalable MCMC for all your exoplanet needs

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Fast & scalable MCMC for all your exoplanet needs! exoplanet is a toolkit for probabilistic modeling of time series data in astronomy with a focus on observations of exoplanets, using PyMC3. PyMC3 is a flexible and high-performance model building language and inference engine that scales well to problems with a large number of parameters. exoplanet extends PyMC3's language to support many of the custom functions and distributions required when fitting exoplanet datasets.

Read the full documentation at


The quickest way to get started is to use pip:

python -m pip install exoplanet

Note that you will need Python (>=3.6) installed for this to work, but then this will install all the required dependencies.

Check out the main installation documentation page for more options.


Check out the tutorials and API docs on the docs page for example usage and much more info. You can also find more in-depth examples on the exoplanet case studies page.


exoplanet is an open source project and we would love it if you wanted to contribute. Check out the developer documentation for more info about getting started.

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