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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Opening a New Frontier in Transient Science with the James Webb Space Telescope
May 14, 2025 07:00 PMLecturesSpeaker: Justin Pierel (STScI) With the launch of the James Webb Space Telescope (JWST), we have entered a new era of transient discovery and understanding. In a relatively short time JWST has expanded…View Webcast -
Inter+Stellar: Harnessing the Intersection Between Stars and the Interstellar Medium
May 12 through 16, 2025 12:00 AMSymposiaHistorically, stars and the ISM in the nearby Universe have often been studied individually. However, this past decade of research has shown that the most exciting advances in each field are powered by…View Webcast -
Observing the Circum(sub)stellar Environments and Atmospheres of the Lowest-Mass Stars, Brown Dwarfs, and Planets
May 7, 2025 03:00 PMColloquiaThe lowest-mass stars and substellar objects serve as a natural bridge between stars and planets, covering the peak of the initial mass function and representing the most common outcomes of star formation…View Webcast -
Spring Colloquium: Presentations from STScI Postdocs
April 30, 2025 03:00 PMColloquiaPresentations featuring Christiana Erba, Chamani Gunasekera, Daniel Maschmann, and Adam Smercina.View Webcast -
STScI Engineering and Technology Colloquium: Technology for HWO
April 28, 2025 10:00 AMColloquiaA special Engineering and Technology Colloquium featuring Bertrand Mennesson (Roman Deputy Project Scientist and HWO Pre-Formulation Scientist at JPL) and Shouleh Nikzad (JPL Fellow, Senior…View Webcast -
Witnessing the Formation of Planetary Systems
April 23, 2025 03:00 PMColloquiaThere has been a tremendous leap forward in our understanding of the formation of planetary systems thanks to substantial advances in our observational capabilities. Observatories like ALMA are routinely…View Webcast -
Star Cluster Formation, Binary Stars, and Multiple Populations: Missing Links
April 16, 2025 03:00 PMColloquiaStars are primarily formed in clustered environments in giant molecular clouds. Stars are also primarily found in binary or higher order multiple systems. This hierarchy of binaries inside clusters, particularly…View Webcast -
Supernova H0pe: The Multiply-imaged Standard Candle That Yielded a Value for the Current Expansion Rate of the Universe
April 9, 2025 03:00 PMColloquiaWe present James Webb Space Telescope (JWST) Prime Extragalactic Areas and Reionization and Lensing Science (PEARLS) observations in the fields of massive galaxy clusters. One cluster, PLCK G165.7+67.0…View Webcast -
Pathway to a Post-Global Warming Future: Presenting Climate Science with Inspiration, Not (Only) Fear
April 8, 2025 10:00 AMColloquiaMany 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…View Webcast -
Animal, Mineral, Microbe: How the Interplay Between Abiotic and Biotic Processes Shapes Deep-Sea Chemoautotrophic Symbioses
April 4, 2025 12:00 PMLecturesLiving organisms evolve in response to one another, but also to the physical and chemical conditions in their habitat. Living things, via their activity, also shape the abiotic world. This is especially…View Webcast -
How to Reionize the Universe: Lessons from Low Redshift
April 2, 2025 03:00 PMColloquiaThe reionization of the intergalactic medium (IGM) at z > 6 is one of the major transformations in the universe’s history, but we do not yet know which galaxies were responsible for this event.…View Webcast -
Galaxy Clusters As Dark Matter Laboratories
March 26, 2025 03:00 PMColloquiaThe 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,…View Webcast -
Exploring the Solar System with the James Webb Space Telescope
February 27, 2025 08:00 PMLecturesSpeaker: Heidi Hammel, AURA 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.…View Webcast -
Exoplanet Atmospheres in the Next Decade: Isotopes, Too Many Atmospheres, and Biosignatures
February 26, 2025 03:00 PMColloquiaIn this presentation, I will describe my very personal view of some of the directions in which I think the study of exoplanet atmospheres will go in the next decade, before the launch of HWO. This view…View Webcast -
Exoplanet Atmospheres Revealed: Insights from JWST Observations
February 19, 2025 03:00 PMColloquiaThe James Webb Space Telescope (JWST) is revolutionizing the field of exoplanet atmospheric science with its unprecedented stability and wavelength coverage. From revealing previously unexplored chemistry…View Webcast
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