On behalf of the NASA Astrophysics Division, the Space Telescope Science Institute (STScI) announces the call for applications for postdoctoral fellowships under the NASA Hubble Fellowship Program (NHFP) beginning in the fall of 2026.

See the full announcement for more detail.

9/2/25

This upgrade includes the following items:

• ACIS T_GAIN file set covering 2022 through 2024
• HRC-S QE Uniformity file set version N0022

See the full announcement for more detail.

8/19/25

Lists of targets recommended by the Cycle 27 Peer Review are now posted.

This page includes separate lists of:

• recommended time on joint partner observatories,
• recommended programs that use Chandra time from multiple cycles,
• recommended Large Project and Very Large Project proposals, and
• overall statistics of the Cycle 27 program.

7/29/25