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SkyPy simulates the astrophysical sky. It provides functions that sample realizations of sources and their associated properties from probability distributions. Simulation pipelines are constructed from these models, while task scheduling and data dependencies are handled internally. The package's modular design, containing a library of physical and empirical models across a range of observables and a command line script to run end-to-end simulations, allows users to interface with external software.
Zoobot classifies galaxy morphology with Bayesian CNN. Deep learning models were trained on volunteer classifications; these models were able to both learn from uncertain volunteer responses and predict full posteriors (rather than point estimates) for what volunteers would have said. The code reproduces and improves Galaxy Zoo DECaLS automated classifications, and can be finetuned for new tasks.