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What is APT?

The Astronomer's Proposal Tool (APT) is used to write, validate, and submit proposals for the Hubble Space Telescope and the James Webb Space Telescope.

Download and Installation Instructions

Trouble installing APT? Please see Troubleshooting Tips at the bottom of each of these platform specific Installation instructions.

Current Release: 2023.3.2

Released: May 25, 2023

Upgrading is required for people working on their HST and JWST programs.

Current and previous release summary

Documentation, Training, and Support