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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Surveying the Universe in 4D: Beating Cosmic Variance with Wide-Field Slitless Spectroscopy from HST, JWST, Euclid, Roman, and Beyond
August 24 through 28, 2026 12:00 AMWorkshopsMassively multiplexed spectroscopy is revolutionizing our understanding of the universe by enabling efficient, statistically robust surveys across large cosmic volumes. By capturing spectra for thousands…View Webcast -
Emulating Galacticus for the Roman Galaxy Redshift Survey
August 20, 2026 04:00 PMLecturesThe Roman Galaxy Redshift Survey will measure redshifts from slitless grism spectroscopy, and testing how reliably those redshifts can be extracted requires realistic simulated surveys - mock skies whose…View Webcast -
2026 HotSci at JHU/STScI
August 19, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Farhan Hasan (STScI) on Shaping Cosmic Ecosystems Through Baryon Cycling: Simulations, Observations, and the promise of the Roman Era.View Webcast -
2026 HotSci at JHU/STScI
August 12, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Swetha Sankar (JHU) on When Jets Don’t Quench: H_2 in Star Forming Low-Excitation Radio Galaxies, Timothy Brandt (STScI) on Moving Objects in JWST…View Webcast -
NASA's Nancy Grace Roman Space Telescope: Countdown to Exploration
August 11, 2026 07:00 PMLecturesSpeakers: Dr. Denton Gibson (NASA's Kennedy Space Center) and Dr. Jessica Lu (University of California, Berkeley) The Nancy Grace Roman Space Telescope—NASA’s next astrophysics flagship…View Webcast -
2026 HotSci at JHU/STScI
August 5, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Matthew Burger (STScI) on Exospheric Escape from a Bare-Rock Planet Orbiting a Solar-Type Star, Adarsh Ranjan (STScI) on From Metal-rich Spirals to Pristine Dwarfs:…View Webcast -
2026 HotSci at JHU/STScI
July 29, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Jimena Rodriguez (STScI) on From Massive Young Stellar Objects to Stellar Clusters: Resolving the Earliest Stages of Star Formation with JWST, Rodrigo Angulo (JHU) on Astronomical…View Webcast -
2026 HotSci at JHU/STScI
July 22, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Jayashree Behera (STScI) on Joint Multiband Photometry with Crowdsource, Jack Neustadt (JHU) on Kinematic Stratification in Extremely Red Quasars Revealed by…View Webcast -
Into the Deep and Beyond: Webb’s First Four Years
July 21, 2026 04:00 PMLecturesSpeaker: Dr. Macarena Garcia Marin, STScI and European Space Agency The Webb Space Telescope is the largest and most sophisticated space telescope ever built. Its successful launch in 2021 marked…View Webcast -
2026 HotSci at JHU/STScI
July 15, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Qier An (JHU) on Unveiling Massive Substellar Companions: A Multi-Method Approach and Nick Indriolo (STScI) on Mapping the Cosmic-Ray Ionization Rate in the…View Webcast -
Planetary Defense: The Risk, Recent Achievements, and Work to Go
July 14, 2026 10:00 AMColloquiaAsteroid impacts pose a credible threat to humanity, but--unlike many types of natural disasters--they are also potentially preventable. Planetary defense encompasses all efforts to detect and warn of…View Webcast -
2026 HotSci at JHU/STScI
July 8, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Alex Malz (STScI) on Leveraging Information Theory for Time-Domain Astrophysics, Rebecca Levy (STScI) on Small but Mighty: Young Massive Star Clusters in Nearby Starburst…View Webcast -
2026 HotSci at JHU/STScI
July 1, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Natalia Oliveros Gomez (JHU) on Linking Variability and Atmospheric Structure in the Benchmark Brown Dwarf Binary WISE 1049AB, Steven Goldman (STScI) on Tracing…View Webcast -
2026 HotSci at JHU/STScI
June 24, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Elena Manjavacas (ESA for STScI) on Stable Rotational Modulation Across Seven Years Baseline for the Planetary-mass Companion Ross 458C, David Coulter (JHU/STScI) on Spectroscopic…View Webcast -
2026 HotSci at JHU/STScI
June 17, 2026 03:00 PMColloquiaHotSci at JHU/STScI featuring Logan Jones (STScI) on Pinwheeling PAHs: A JWST Tour of M101 and its Interstellar Medium, Andrew Fox (STScI) on Dark Matter Minihalos and M94 Cloud-9, and Leah…View Webcast
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