General Observers (GO) programs provide the worldwide astronomical community with opportunities to apply for observation time with JWST in a given cycle (generally 1 year in duration). GO proposals may be submitted for any amount of observing time, counted in hours, including all overheads. GO proposals for Cycles 1-3 are classified as Small (≤ 25 hours), Medium (> 25 and ≤ 75 hours), and Large (> 75 hours). Starting with Cycle 4, GO proposals are classified as Very Small (≤ 20 hours), Small (> 20 and ≤ 50 hours), Medium (> 50 and ≤ 130 hours), and Large (> 130 hours). A variety of proposal types include:

• Treasury
• Calibration
• Survey
• Archival research 

Use the links below to view the approved GO proposals for each cycle: 

• Cycle 4 (July 2025 - June 2026)
• Cycle 3 (July 2024 - June 2025)
• Cycle 2 (July 2023-June 2024)
• Cycle 1 (July 2022-June 2023)