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https://www.stsci.edu/news/journalist-resources Journalist Resources | STScI Contact members of the news team and learn about our mission, history, goals, and images. journalist resources stsci https://www.stsci.edu/hst/instrumentation/legacy/wfpc2 WFPC2 | STScI stsci https://www.stsci.edu/roman/observatory Observatory | STScI Learn about the Nancy Grace Roman Space Telescope’s sensitivity and resolution, as well as its instruments and their capabilities. observatory stsci https://www.stsci.edu/scientific-community/software/astronomers-proposal-tool-apt/hst-training-materials HST Training Materials | STScI Find training videos for using the Astronomer's Proposal Tool (APT) to propose for HST. training materials hst stsci https://www.stsci.edu/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm Science Operations Design Reference Mission (SODRM) | STScI The Science Operations Design Reference Mission (SODRM) was an exercise in simulating the scientific program of the observatory and represents the range and... science operations design reference mission stsci https://www.stsci.edu/contents/news-releases/2026/news-2026-116 NASA's Webb Redefines Dividing Line Between Planets, Stars | STScI dividing line nasa webb redefines planets https://www.stsci.edu/hst/instrumentation/acs/calibration Calibration | STScI Learn about the basic steps taken to calibrate ACS data and view a list of ACS calibration proposals calibration stsci https://www.stsci.edu/roman/documentation/science-publications Science Publications | STScI View a list of publications from the scientific literature with significant content related to the Nancy Grace Roman Space Telescope. science publications stsci https://www.stsci.edu/search-results/advanced-search-syntax Advanced Search Syntax | STScI advanced search syntax stsci https://www.stsci.edu/hst/instrumentation/wfc3/data-analysis Data Analysis | STScI data analysis stsci https://www.stsci.edu/hst/proposing/phase-ii/guidelines-and-documents Guidelines and Documents | STScI View a list of the documentation and tools necessary to develop, submit, and monitor HST Phase II proposals. guidelines documents stsci https://www.stsci.edu/stsci-research/fellowships/brinson-prize-fellowship-program Brinson Prize Fellowship Program | STScI Read about the Brinson Fellowship, which provides three years of funding to early career astrophysicists who research cosmology. fellowship program brinson prize stsci https://www.stsci.edu/hst/instrumentation/focus-and-pointing Focus and Pointing | STScI Historical information on Hubble's focus changes, pointing and jitter performance, and geometric characteristics of the Fields of View. focus pointing stsci https://www.stsci.edu/hst/instrumentation/stis/performance/background-noise Background Noise | STScI background noise stsci https://www.stsci.edu/stsci-research/research-topics-and-programs/institute-for-planets-and-life/biological-sciences Biological Sciences | STScI Meet the biological sciences researchers who contribute to the Institute for Planets and Life. biological sciences stsci https://www.stsci.edu/events/webcasts Webcasts | STScI The Space Telescope Science Institute presents live and archived webcasts that examine an array of science, technology, and business topics. webcasts stsci https://www.stsci.edu/roman/documentation Documentation | STScI Access documentation about the Nancy Grace Roman Space Telescope’s science capabilities, instruments and technology, and science operations. documentation stsci https://www.stsci.edu/roman/about/roman-committees Roman Committees | STScI Learn about Roman Space Telescope advisory committees including the active Roman Science User Panel (RSUP) and past RSTAC, providing community input to... roman committees stsci https://www.stsci.edu/jwst/documentation Documentation | STScI JWST Documentation (JDox) and the JWST Help Desk provide mission-related documentation and support. documentation stsci https://www.stsci.edu/jwst/science-execution/approved-programs Approved Programs | STScI Approved JWST observations organized by types of programs approved programs stsci https://www.stsci.edu/hst/instrumentation/acs/documentation/conference-posters Conference Posters | STScI Sort and filter a library of posters presented by the ACS team at past American Astronomical Society conferences. conference posters stsci https://www.stsci.edu/stsci-research/fellowships/nasa-hubble-fellowship-program/2026-nhfp-fellows 2026 NHFP Fellows | STScI Read short profiles about the 2026 NASA Hubble Fellowship Program (NHFP) awardees. 2026 fellows stsci https://www.astro.umd.edu/news-events/events/ctc-seminar-l-y-aaron-yung-stsci CTC Seminar: L. Y. Aaron Yung, STScI | University of Maryland: Department of Astronomy Three years of searching for the most distant galaxies with JWST and what have we learned so far? maryland department astronomy ctc seminar aaron yung https://www.stsci.edu/hst/instrumentation/wfc3/proposing/dithering-strategies Dithering Strategies | STScI dithering strategies stsci https://www.stsci.edu/roman/news-and-events/press Press | STScI Access press releases from STScI and our partners about the Nancy Grace Roman Space Telescope. press stsci https://www.stsci.edu/hst/instrumentation/cos/calibration/cycle-32-calibration-plan Cycle 32 Calibration Plan | STScI calibration plan stsci cycle 32 https://www.stsci.edu/hst/instrumentation/wfc3/software-tools/cte-tools CTE Tools | STScI cte tools stsci https://www.stsci.edu/jwst/science-execution/program-information?id=9219 Program Information | STScI Use the program information tool to obtain information about a specific James Webb Space Telescope (JWST) observing program. program information stsci https://www.stsci.edu/jwst/science-execution/program-information?id=4706 Program Information | STScI Use the program information tool to obtain information about a specific James Webb Space Telescope (JWST) observing program. program information stsci https://www.stsci.edu/jwst/science-execution/approved-programs/dd-ers/program-1324 ERS Program 1324 | STScI Details of ERS Program 1324 - Through the Looking GLASS: A JWST Exploration of Galaxy Formation and Evolution from Cosmic Dawn to Present Day ers program 1324 stsci https://www.stsci.edu/hst/instrumentation/cos/calibration/cycle-17-calibration-plan Cycle 17 Calibration Plan | STScI calibration plan stsci cycle 17 https://www.stsci.edu/jwst/science-planning/proposal-planning-toolbox/psf-simulation-tool PSF Simulation Tool | STScI The WebbPSF Simulation Tool simulates point spread functions for JWST instruments. simulation tool psf stsci https://www.newswise.com/institutions/newsroom/1436/ Space Telescope Science Institute (STScI) space telescope science institute stsci https://www.stsci.edu/roman/science-planning-toolbox Science Planning Toolbox | STScI Explore the software and simulation tools being developed for the Nancy Grace Roman Space Telescope. science planning toolbox stsci https://www.stsci.edu/stsci-research/fellowships/nasa-hubble-fellowship-program NASA Hubble Fellowship Program | STScI Learn about the requirements for the NASA Hubble Fellowship Program (NHFP), which allows promising postdoctoral scientists to pursue independent research. nasa hubble fellowship program stsci https://www.stsci.edu/hst/instrumentation/acs/instrument-design Instrument Design | STScI Learn more information about the ACS detectors optical path and instrument characteristics. instrument design stsci https://www.stsci.edu/scientific-community/grants-administration Grants Administration | STScI Find grant information, including budget submissions and approvals for the Hubble and the James Webb space telescopes. grants administration stsci https://www.stsci.edu/what-we-do What We Do | STScI Learn how we continue to expand the frontiers of space astronomy with our support of the Hubble, Webb, and Roman missions. stsci https://www.stsci.edu/jwst/science-planning/proposal-planning-toolbox/exposure-time-calculator EXPOSURE TIME CALCULATOR | STScI JWST's Exposure Time Calculator performs signal-to-noise ratio calculations for all observing modes. exposure time calculator stsci https://www.stsci.edu/hst/instrumentation/stis/documentation Documentation | STScI documentation stsci https://www.stsci.edu/hst/instrumentation/cos/calibration/cycle-30-calibration-plan Cycle 30 Calibration Plan | STScI calibration plan stsci cycle 30 https://www.stsci.edu/jwst/science-execution/approved-programs/guaranteed-time-observations GTO | STScI Review approved JWST Guaranteed Time Observations (GTO) programs for Cycles 1-3. gto stsci https://www.stsci.edu/hst/instrumentation/stis/observing-strategies/imaging Imaging | STScI imaging stsci https://www.stsci.edu/stsci-research/fellowships/exoplanet-science-fellowship Exoplanet Science Fellowship | STScI Learn about the requirements for the Exoplanet Science Fellowship, which recognizes postdoctoral researchers working in any area of exoplanet research. exoplanet science fellowship stsci https://www.stsci.edu/hst/instrumentation/acs/proposing/exception-report-instructions Exception Report Instructions | STScI View a checklist of detailed steps for inspecting ACS data after receiving an HST exception report. report instructions exception stsci https://www.stsci.edu/roman/news-and-events News & Events | STScI Find news and events about the Nancy Grace Roman Space Telescope, including newsletter articles, press releases, conferences, and workshops. news events stsci https://www.stsci.edu/hst/proposing Proposing | STScI Get information on the policies and procedures for developing and submitting proposals for HST observation time. proposing stsci https://www.stsci.edu/stsci-research/fellowships/nasa-hubble-fellowship-program/host-institutions Host Institutions and the NHFP Employment Policy | STScI View the list of host institutions that can host NASA Hubble Fellowship Program Fellows under the updated NHFP host institution policy. employment policy host institutions stsci https://www.stsci.edu/stsci-research/caroline-herschel-visitor-program Caroline Herschel Visitor Program | STScI Learn about the Caroline Herschel Visitor Program, which hosts distinguished astronomers from the world at the Space Telescope Science Institute (STScI). caroline herschel visitor program stsci https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/documentation Documentation | STScI View the list of documentation files supporting reference data for calibration and tools. documentation stsci https://www.stsci.edu/jwst/science-execution/program-information?id=6379 Program Information | STScI Use the program information tool to obtain information about a specific James Webb Space Telescope (JWST) observing program. program information stsci https://www.stsci.edu/hst/instrumentation/cos/performance Performance | STScI performance stsci https://www.stsci.edu/jwst/science-execution/program-information?id=9327 Program Information | STScI Use the program information tool to obtain information about a specific James Webb Space Telescope (JWST) observing program. program information stsci https://www.stsci.edu/who-we-are/our-history Our History | STScI Learn why the Space Telescope Science Institute was created and how our missions and scientific contributions have evolved with each new mission we support. history stsci https://www.stsci.edu/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-photometric-calibration/previous-uvis-photometric-calibrations Previous UVIS Photometric Calibrations | STScI View the previous calibrations for the WFC3/UVIS instrument. previous uvis photometric calibrations stsci https://www.stsci.edu/hst/instrumentation/focus-and-pointing/focus/tiny-tim-hst-psf-modeling Tiny Tim HST PSF Modeling | STScI Resources for Hubble's Tiny Tim, a point spread function (PSF) modeling tool. tiny tim hst psf modeling stsci https://www.stsci.edu/hst/instrumentation/cos/documentation/stsci-analysis-newsletter-stan STScI Analysis Newsletter (STAN) | STScI stsci analysis newsletter stan https://www.stsci.edu/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/exoplanet-programs Exoplanet Programs | STScI Listing of all Exoplanet Science programs in the SODRM. exoplanet programs stsci https://www.stsci.edu/hst/proposing/phase-i Phase I | STScI Learn about the HST Phase I proposal process, where observation or archival research funding requests are evaluated by a community-based peer-review panel. phase stsci https://www.stsci.edu/hst/instrumentation/acs/data-analysis/prism-grism/hrc-g800l HRC G800L | STScI Download the ACS/HRC G800L calibration products to be used with aXe hrc stsci https://www.stsci.edu/hst/proposing/phase-i/peer-review-information Peer Review Information | STScI Learn about STScI's Science Policies Group and how they conduct the HST proposal review process. peer review information stsci https://www.stsci.edu/hst/instrumentation/acs/shortcuts Shortcuts | STScI shortcuts stsci https://www.stsci.edu/jwst/science-execution/approved-ers-programs DD-ERS | STScI Review approved JWST Early Release Science (ERS) programs. dd ers stsci https://www.stsci.edu/hst/about/key-science-themes/stars-and-their-environments Stars and Their Environments | STScI The Hubble Space Telescope helps to understand the lifecycles of stars and has unveiled stars and planetary systems in the making. stars environments stsci https://www.stsci.edu/hst/instrumentation/wfc3/performance/anomalies Anomalies | STScI anomalies stsci https://www.stsci.edu/ Home | STScI The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives. stsci https://www.stsci.edu/scientific-community/stsci-library-and-institutional-archive/institutional-archive Institutional Archive | STScI Learn about the STScI institutional archive, which captures key administrative, scientific, and technical documentation of enduring value. institutional archive stsci https://www.stsci.edu/roman/news-and-events/news News | STScI news stsci https://www.stsci.edu/jwst/science-planning/user-committees/jwst-users-committee JWST Users Committee | STScI The JWST Users Committee provides user advice to the observatory as a whole and ensures operations proceed as expected to maximize the observatory's scientific... users committee jwst stsci https://www.stsci.edu/jwst/science-execution/program-information?id=4446 Program Information | STScI Use the program information tool to obtain information about a specific James Webb Space Telescope (JWST) observing program. program information stsci https://www.stsci.edu/hst/instrumentation/acs/proposing/dither-strategies/acs-wfc-mosaic-box ACS-WFC-MOSAIC-BOX | STScI Learn about the two dimensional ACS/WFC box dither pattern used for mosaics acs wfc mosaic box stsci https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools Reference Data for Calibration and Tools | STScI Learn more about the reference data used for the calibration of HST and JWST observations and to support the planning and analysis tools developed at STScI. reference data calibration tools stsci https://www.stsci.edu/hst/instrumentation/acs/proposing/dither-strategies/acs-sbc-dither-box ACS-SBC-DITHER-BOX | STScI Learn about two-dimensional ACS/SBC box dither patterns acs sbc dither box stsci https://www.stsci.edu/stsci-research/research-topics-and-programs/russell-b-makidon-optics-laboratory/news-from-the-lab News from the Lab | STScI News and updates about Makidon Optics Lab experiments and the team members. news lab stsci https://www.stsci.edu/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-encircled-energy UVIS Encircled Energy | STScI uvis encircled energy stsci https://www.stsci.edu/hst/proposing/phase-ii/phase-ii-proposal-preparation Phase II Proposal Preparation | STScI Learn more about the process and policies for preparing a Hubble Space Telescope (HST) Phase II proposal. phase ii proposal preparation stsci