The Hubble Space Telescope Primer for Cycle 33
The HST Primer provides an introduction to the Hubble Space Telescope for Phase I proposers.
About This Document
The Hubble Space Telescope (HST) Primer for Cycle 33 is a companion document to the Hubble Space Telescope Call for Proposals for Cycle 33. It provides an overview of HST, with basic information about telescope operations, instrument capabilities, and technical aspects of the proposal preparation process. A thorough understanding of the material in this document is essential for the preparation of a competitive proposal. The Call for Proposals discusses the policies and procedures for submitting a Phase I proposal for HST observing or archival research. Technical documentation on the instruments are available in their respective handbooks, available on the HST Document overview site.
Late Breaking News
See also HST New and Important Features.
Proposing Calendar and Deadlines
Cycle 33 Phase I proposal deadline: Thursday, April 10, 2025 at 8:00pm EDT
Cycle 33 Peer Review: June 23 - July 3, 2025
Cycle 33 Phase II proposal deadline: anticipated August 14, 2025 at 5:00pm EDT
Cycle 33 Budget deadline: August 14, 2025 at 5:00pm EDT
Where to Get Help
Submit questions to the HST Help Desk at http://hsthelp.stsci.edu. See http://www.stsci.edu/hst/ for additional tools and resources.
Who's Responsible
The HST Call for Proposals and related materials for Cycle 33 were edited by Molly Peeples (Hubble Science Policies Deputy). The Associate Director for Science, Mercedes López-Morales, and the Science Mission Office (SMO) at STScI are responsible for the oversight of the HST science program selection process. SMO members include Marc Postman (SMO Mission Head), Laura Watkins (SMO Deputy Mission Head), Claus Leitherer (Hubble Science Policies Lead), Katey Alatalo, Daniel D'Orazio, Andrew Fruchter, Amy Jones, Susan Kassin, Rebecca Levy, Amaya Moro-Martin, Nikolay Nikolov, Jamila Pegues, Linda Smith, and Technical Manager Aleksandra Hamanowicz. Neill Reid (Multi-Mission Project Scientist) participates in an advisory capacity.