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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: 2023.1.1

Released: February 23, 2023

Upgrading is required for people preparing HST Cycle 31 proposals and recommended for people working on Cycle 30 (and earlier) programs.

Upgrading is required for people working on their JWST programs.

Current and previous release summary

Documentation, Training, and Support