The Space Telescope Science Institute (STScI) presents live and archived webcasts that examine an array of science, technology, and business topics. Although these lectures primarily serve the scientific community, many are also designed for the public. STScI employees will be prompted to sign in to access restricted/internal webcasts.
Use the filter bar below to search by specific criteria including Type, Mission, Keyword, and/or Date. Click the Submit button to generate the query. Information and resources for each event may be found by clicking on the "Learn More" link and recordings may be watched via the "View Webcast" link. All times listed are Eastern Time, unless otherwise noted. Refer to our Webcast FAQs page for guidance with questions.
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CoolSci: Celebrating STScI Achievement in Astronomical Research Award Winners
January 14, 2026 03:00 PMColloquiaFeaturing 2025 STScI Achievement in Astronomical Research Award Winners Marco Chiaberge (STScI), Stephanie La Massa (STScI), and Marc Rafelski (STScI).View Webcast -
Planets, Asteroids, and Interstellar Interlopers, OH MY! Revealing the Solar System with JWST
December 17, 2025 04:00 PMLecturesSpeaker: Dr. Stefanie Milam (NASA Goddard Space Flight Center) The James Webb Space Telescope may have been designed to detect the first stars and galaxies of our Universe, but it is also seeking…View Webcast -
Fundamental Properties and Atmospheric Chemistry of Cool Brown Dwarfs with JWST
December 10, 2025 03:00 PMColloquiaWhile great progress has been made over the last 20 years in determining the fundamental properties of brown dwarfs, the coolest brown dwarfs with Teff < 500 K have proven difficult to characterize…View Webcast -
Metal-Poor Massive Stars and Cosmic Mysteries from Redshift 10+ to the Local Universe
December 3, 2025 03:00 PMColloquiaJWST is providing an unprecedented direct glimpse of the first galaxies in formation. This promises the opportunity to seek answers to longstanding questions in astrophysics, from the details of reionization…View Webcast -
Photometric Calibration Uncertainties in Stage IV Supernova Cosmology
November 20, 2025 12:00 AMLecturesUpcoming supernova surveys, such as the Nancy Grace Roman Space Telescope (Roman) and the Vera Rubin Observatory’s LSST, are expected to discover over a million supernovae, vastly increasing current…View Webcast -
Trustworthy Machine Learning for Astrophysical Discovery
November 19, 2025 03:00 PMColloquiaModern machine learning techniques open doors to powerful data analysis strategies that were not feasible even a few years ago — approaches that could enable transformative discoveries with current…View Webcast -
Understanding Dwarf Galaxies to Understand Dark Matter
November 12, 2025 03:00 PMColloquiaThe large-scale structure of our Universe is well described by a model in which matter is predominantly Cold Dark Matter (CDM). While CDM was initially thought to have trouble reproducing observations…View Webcast -
Resolved Stellar Populations and the ISM: Small Scales, Big Fun
October 22, 2025 03:00 PMColloquiaMany of the astrophysical processes that shape galaxies — stellar evolution, star formation, feedback into the ISM — are fundamentally small-scale. At the typical kiloparsec-scale resolution…View Webcast -
Dust-Enshrouded Eruptions from Planets to Supermassive Black Holes
October 8, 2025 03:00 PMColloquiaEruptive mass loss and the resulting dramatic brightness variations are ubiquitous in the lives of stars, their planetary companions, and their remnants. While these episodes can fundamentally change their…View Webcast -
The Thermal Histories of Solar System Moons and Asteroids from JWST/ALMA
October 1, 2025 03:00 PMColloquiaThe heat flow of a planetary body plays a major role in defining its evolution and current composition, driving processes from internal differentiation during its formation through geological activity…View Webcast -
Optimizing Roman Photometric Redshifts for HLIS
September 25, 2025 12:00 AMLecturesPhoto-z’s are crucial for the main cosmology, galaxy evolution, and transient science drivers of Roman. The transformative nature of the Roman dataset presents both new challenges but also new opportunities…View Webcast -
A Thousand Earths: Progress Toward a Constellation of Very Large Space Telescopes for Statistical Biosignature Surveys in Extrasolar Planets
September 24, 2025 03:00 PMColloquiaAchieving a comprehensive understanding of habitable and inhabited planets, and correct interpretation of biosignatures, requires systematic, statistical studies of large samples of exoplanets. However,…View Webcast -
Alien Skies: Exploring Distant Exoplanet Atmospheres with Webb
September 17, 2025 07:00 PMLecturesSpeaker: Dr. Néstor Espinoza (Space Telescope Science Institute) The James Webb Space Telescope (JWST) is humanity’s sharpest eye to look at the infrared Universe. From being able…View Webcast -
Again! - But Faster, Better, and With More Physics: ML-accelerated Inference of Galaxy Properties in Deep and Wide Surveys of the Universe
September 17, 2025 03:00 PMColloquiaThe inference of the physical properties of galaxies at cosmological distance requires modeling a wide range of physics, including e.g. stellar evolution and atmospheres; dust attenuation and re-emission;…View Webcast -
Gaia’s Binary Star Revolution
September 10, 2025 03:00 PMColloquiaBy precisely measuring the motions stars on the sky over time, the Gaia mission is conducting a comprehensive census of the Milky Way's binary stars. These data are transformative both for population…View Webcast
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