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.

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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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  1. The Fate of Volatiles Through Earth's Accretion and the Moon-forming Giant Impact

    December 6, 2024 12:00 PM
    Lectures
    Delivery and loss of volatile elements and compounds (such as water, carbon, nitrogen and the noble gases) during Earth’s accretion set the stage for the rest of our planet's history. Volatiles…
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  2. Hunting the Stellar Undead

    December 3, 2024 08:00 PM
    Lectures
    Speaker: Gregory Sivakoff (University of Alberta) Stars are born, and stars die, but not all stars fade quietly into the night after their death. In fact, some are even more spectacular in their death…
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  3. The Invisible Universe and the Power of Citizen Science

    November 14, 2024 02:30 PM
    Lectures
    Speaker: Eleni Vardoulaki (National Observatory of Athens) What's in the invisible universe? How can we best observe it? The international collaboration Evolutionary Map of the Universe (EMU)…
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  4. Lessons Learned from the James Webb Space Telescope

    November 12, 2024 10:00 AM
    Colloquia
    The James Webb Space Telescope (JWST), launched on December 25, 2021, is NASA’s successor mission to the Hubble Space Telescope. JWST has been designed and developed to observe “first light”…
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  5. Strange New Worlds

    November 1, 2024 12:00 PM
    Lectures
    Is there a universal divide between planets with and without atmospheres? Is it based on their incident fluxes and escape velocities? By studying exoplanets that span the cosmic shoreline, we have begun…
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  6. Accurate Flux Calibration in the Era of Space Astronomy and All-Sky Surveys

    October 22 through 25, 2024 12:01 AM
    Workshops
    Advances in space telescope technology and all-sky surveys are driving the need for more precise and accurate flux calibration across the observable spectrum.  The Space Telescope Science Institute…
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  7. YAE In-Person Family STEM Forum

    October 17, 2024 05:00 PM
    Community Events
    Please join us in-person to learn more about astronomy during our Youth for Astronomy and Engineering Program event "STEM Forum" followed by an opportunity to engage in hands-on activities and…
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  8. Enceladus's Plume-Derived 'Snow' Fall

    October 4, 2024 12:00 PM
    Lectures
    Tectonic pit chains are geologic landforms observed on many solar system bodies, and in the outer solar system they are most clearly observed on Enceladus. Pit chains form above a dilational fault or extensional…
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  9. Cosmic Acceleration in the Roman Era

    October 2, 2024 03:00 PM
    Colloquia
    Cosmic acceleration is one of the most surprising cosmological discoveries of the past century. Even the "simplest" explanations require new, cosmologically dominant energy components with exotic…
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  10. White Dwarf Supernovae

    September 25, 2024 03:00 PM
    Colloquia
    Type Ia supernovae (SN Ia) play a starring role in our view of the Universe.  Observations of SN Ia led to two cosmological surprises: the discovery of the accelerating Universe and the Hubble Constant…
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  11. Fall Colloquium: Presentations from Incoming STScI Postdocs

    September 18, 2024 03:00 PM
    Colloquia
    Presentations featuring Paul Bennet, Farhan Hasan, Jegug Ih, Ryan Richards Vaught, and Mans Holmberg.
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  12. The Thirty Meter Telescope: Progress and Prospects

    September 11, 2024 03:00 PM
    Colloquia
    The Thirty Meter Telescope is a top-ranked priority of the Astro 2020 Decadal Survey because its combination of very large aperture and adaptive optics opens up vast areas for unique observational work…
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  13. High Performance Infrared Detectors: The Infrared Focal Plane Arrays in NASA’s Flagship Astrophysics Missions

    September 10, 2024 10:00 AM
    Colloquia
    Infrared astronomy is dependent on hybrid CMOS infrared focal plane arrays (FPAs).  The most advanced FPAs are those that use HgCdTe as the detector material.  This talk will start with a pedagogical…
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  14. Hot, Warm, Cold, and Frigid Exoplanets from the Nancy Grace Roman Space Telescope

    September 5, 2024 03:30 PM
    Colloquia
    The Nancy Grace Roman Space Telescope, or Roman, is NASA’s next large astrophysics mission, due to be launched in late 2026. Roman will have a wavelength range, aperture, and angular resolution similar…
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  15. NASA's Next Big Thing: The Nancy Grace Roman Space Telescope

    September 3, 2024 08:00 PM
    Lectures
    Speaker: Ori Fox (Space Telescope Science Institute) NASA's upcoming Nancy Grace Roman Space Telescope is readying for launch in late 2026. Roman will be able to survey the sky 1,000 times…
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