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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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 -
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 -
Finding the Most Distant Galaxies in the Universe with JWST
September 3, 2025 03:00 PMColloquiaJames Webb Space Telescope (JWST) has opened a new window into the early universe, enabling sensitive, high-resolution images of the near-infrared sky and spectroscopy of faint, distant sources. The JWST…View Webcast -
FORGE'd in FIRE: New Physics Connecting Back Holes, Stars, Galaxies, and the CGM on au-to-Mpc Scales
August 27, 2025 03:00 PMColloquiaMany problems in astrophysics involve a tremendous scale separation. A particularly dramatic example is the case of supermassive black holes, whose impact is felt on all of these scales. I’ll show…View Webcast -
2025 HotSci at JHU/STScI: ISM Feedback
August 20, 2025 03:00 PMColloquia"ISM Feedback" featuring Kalina Nedkova (STScI) on PASSAGE: Measuring the Mass-Metallicity Relation for Low-Mass Galaxies at z<3.4 and Calum Hawcroft (STScI) on Towards…View Webcast -
ACROSS: Enabling Time Domain and Multi-Messenger Astrophysics with NASA Missions
August 14, 2025 10:00 AMColloquiaThe Astro2020 Decadal Survey recommended an investment in Time Domain and Multi-Messenger Astrophysics (TDAMM) as the top-priority sustaining activity in space for the coming decade. One aspect of NASA’s…View Webcast -
Accreting Neutron Stars and Black Holes in our Galaxy through the Lens of Roman
July 31, 2025 04:00 PMLecturesOver the past decade, our understanding of the population and behavior of compact objects has shifted significantly, thanks to a multitude of novel facilities, from gravitational wave observatories, astrometry…View Webcast -
2025 HotSci at JHU/STScI: Exoplanets
July 30, 2025 03:00 PMColloquia"Exoplanets" featuring Stephen Schmidt (JHU) on K2-18 b is (Probably) Not a Hycean Biosphere and Emily Rickman (STScI) on Characterizing Substellar Companions.View Webcast -
2025 HotSci at JHU/STScI: High-Redshift Galaxies
July 23, 2025 03:00 PMColloquia"High-Redshift Galaxies" featuring Rebecca Larson (STScI) on Advancements in Exploring the Early Universe: Unlocking the Mysteries of Galaxies During the Reionization Era and Pallavi…View Webcast -
The Nancy Grace Roman Space Telescope: Years in the Making - Steps from Discovery
July 16, 2025 07:00 PMLecturesSpeakers: Dr. Kristen McQuinn (Space Telescope Science Institute) and Robyn Sanderson (University of Pennsylvania) The Nancy Grace Roman Space Telescope is NASA’s next large strategic mission. In…View Webcast
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