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domain	stsci.edu
summary	Here’s a summary of the STScI website content, broken down into key areas: Overall Mission & Operations: * STScI’s Role: The Space Telescope Science Institute (STScI) is the organization responsible for operating the Hubble Space Telescope (HST) and now the James Webb Space Telescope (JWST) for NASA. It manages observations, data processing, and dissemination. * Multiple Telescopes: The site covers operations for HST, JWST, NICMOS, WFPC2, and other legacy instruments. Hubble Space Telescope (HST) - Core Operations: * Proposal Process: A detailed breakdown of the proposal process for observing time on HST, including Phase I and Phase II proposals, guidelines, and tools like the Exposure Time Calculator and Proposal Planning Toolbox. * Instrumentation: Extensive information about the instruments on HST (ACS, COS, WFC3, STIS), including their design, performance characteristics (e.g., CTE – Cosmic Ray Effects), and calibration procedures. * Data Analysis: Provides tools and resources for analyzing HST data, including DrizzlePac, calibration software, and data retrieval instructions via the MAST archive. * Calibration: A robust system for calibrating HST data with detailed plans, reference files, and software tools. James Webb Space Telescope (JWST) - Current Operations: * Mission Overview: Details of JWST’s history, timeline, and scientific goals. * Observing Programs: Covers approved programs, observing strategies, and tools for planning observations (exposure time calculators, PSF simulation). * Instrumentation: Similar to HST, it describes JWST’s instruments (NIRCam, NIRISS, NIRSpec, MIRI), their design, performance, and calibration procedures. * Data Analysis: Provides tools and resources for analyzing JWST data, including data retrieval and calibration. Supporting Resources & Community: * Users Committee & Membership: Information about the Space Telescope Users Committee and STScI membership. * Scientific Themes: Outlines key science areas being investigated by STScI researchers. * Software & Tools: Includes tools like Astronomers Proposal Tool (APT), DrizzlePac, and simulation software. * Archive & Data Retrieval: Information on accessing data through the MAST archive. * Publications & Research: A repository of STScI’s publications, research groups, and fellowships. * Events & Outreach: Details about events, lectures, and outreach programs. Legacy Instruments & Archives: * Historical Data: Access to archived data and documentation from previous telescopes (WFPC2, NICMOS, etc.). * Calibration Reference Data System (CRDS): A central repository for calibration files. This summary emphasizes the comprehensive range of information and tools offered by STScI to support astronomical research utilizing Hubble and James Webb Space Telescopes.
title	Home \| STScI
description	The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives.
keywords	calibration, science, data, cycle, program, instrument, plan, news, documentation, group, analysis, atlas, programs, tools, events, reports, space
upstreams
downstreams
nslookup	A 99.84.9.45, A 99.84.9.101, A 99.84.9.60, A 99.84.9.13
created	2026-02-15
updated	2026-02-15
summarized	2026-03-02

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