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. Pathway to a Post-Global Warming Future: Presenting Climate Science with Inspiration, Not (Only) Fear

    April 8, 2025 10:00 AM
    Colloquia
    Many people, and especially young people, express despair when it comes to the topic of climate change, which is unsurprising given that the media often portrays our climate future as a choice between…
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  2. Galaxy Clusters As Dark Matter Laboratories

    March 26, 2025 03:00 PM
    Colloquia
    The structure of dark halos carries signatures of their mass, dynamical state, and the nature of dark matter itself. Some of the most constraining signals can be found in the outskirts of galaxy clusters,…
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  3. Exploring the Solar System with the James Webb Space Telescope

    February 27, 2025 08:00 PM
    Lectures
    The James Webb Space Telescope is revolutionizing our knowledge of the cosmos, from the most distant galaxies to objects right here in our own local neighborhood. Infrared  studies of the Solar…
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  4. Toward Sustainable Research: Methods and Tools from Labos 1point5

    February 18, 2025 10:00 AM
    Colloquia
    The Paris agreement, adopted in 2015 by over 190 countries, targeted to "significantly reduce global greenhouse gas emissions with the aim of limiting global warming to 2 °C this century, while…
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  5. Spring Colloquium: Presentations from STScI Postdocs

    February 12, 2025 03:00 PM
    Colloquia
    Presentations featuring Ilias Goovaerts, Macarena Garcia del Valle-Espinosa, Alexander Madurowicz, Katie Crotts, Rebecca Levy, and Alejandro Crespo Gomez.
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  6. What Biogeochemical Information Is Preserved in the Lipids of Extreme Archaea?

    February 7, 2025 12:00 PM
    Lectures
    All life as we know it builds cell membranes that serve as an essential barrier from the external environment and facilitate the flow of matter and energy. The lipid membrane composition and its isotope…
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  7. 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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  8. 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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  9. 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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  10. 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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  11. 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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  12. 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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  13. 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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  14. 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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  15. 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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