23 May 2023
We invite scientists to participate in Cycle 31 of the Hubble Space Telescope (HST). The telescope and its instruments were built under the auspices of the National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA). Management of HST’s scientific program is carried out by the Space Telescope Science Institute (STScI). We anticipate allocating up to 2300 orbits in this cycle, including 1200 orbits for Small Programs, 600 orbits for Medium Programs, and 500 for Large and Treasury Programs. An additional 850 Snapshot observations and 500 Pure-Parallel observations may be allocated. Abstracts of previously accepted programs can be found on the HST proposal catalogs webpage.
More information on Hubble Space Telescope Cycle 31 Proposals can be found here: Hubble Space Telescope Call for Proposals for Cycle 31