The Science Policy Division (SPD) at the Space Telescope Science Institute (STScI) is responsible for running the Telescope Allocation Committees (TACs) for HST and JWST, and for convening and coordinating the (Hubble) Space Telescope Users Committee (STUC) and JWST Users Committee (JSTUC). SPD also prepared the Calls for Proposals (CfPs) for HST and JWST, coordinates the review of Director's Discretionary (DD) programs for HST and JWST, and provides policy consultations for the Telescope Time Review Boards (TTRBs).
Calls for Proposals
- Hubble Space Telescope Call for Proposals for Cycle 34 (released December 12, 2025)
- JWST Call for Proposals for Cycle 6 (released July 20, 2026)
- HST Call for Proposals for Cycle 35 (to be released December 16, 2026)
Telescope Allocation Committees
- JWST Cycle 6 Deadline: Wednesday September 30, 2026 at 8pm ET (see key dates)
- HST Cycle 35 Deadline: Thursday April 1, 2027 at 8pm ET (see key dates)
- Volunteer to serve on the TAC
- TAC Submission and Results Statistics
- TAC Reviewer Lists