Timeline

The road from the TDT kick-off to the full proposal for ESO’s Expanding Horizons call.

  1. Completed: Q4 2024

    Kick-off meeting, The Hague

    The TDT collaboration holds its kick-off meeting in The Hague.

  2. Completed: Q3 2025

    ESO opens the Expanding Horizons call

    ESO invites the community to propose a transformational facility for the 2040s: the next major facility after the ELT.

  3. Completed: December 2025

    Community white papers

    TDT science cases are written up as white papers for ESO’s call for white papers. See the white papers.

  4. Completed:

    TDT / Proto-TDT meeting, Hamburg

    Collaboration meeting at the Universität Hamburg.

  5. Next milestone:

    Letter of Intent deadline

    Letters of Intent are due to ESO.

  6. Upcoming:

    Full proposal deadline

    Full proposals are due to ESO.