Cosmic OriginsCall for White Papers: Multi-Cycle Treasury Program Concepts with JWST 11 August 2026Deadline: November 4th, 2026STScI is requesting white papers from the community with compelling scientific ideas for Multi-Cycle Treasury programs that require large allocations of JWST telescope time to complete. The deadline for white papers is Wednesday, November 4th, 2026 at 11:59pm ET. With this goal in mind, STScI calls the user community to submit White Papers with ideas for JWST Multi-Cycle Treasury (MCT) programs covering any science topic. White papers outlining concerns about the potential establishment of JWST MCT programs may also be submitted. Additionally, authors are encouraged to join the Webb Office Hours session held on August 27th at 11am EDT, where experts will be available to answer questions related to this call for white papers.