EEPS Dissertation Defense: Thomas J. Condus
Investigation of surface material properties at Meridiani and Oxia Planum using advanced hyperspectral and image data processing techniques
Past Events
MCSS 50th Anniversary Symposium
Join us for our 50th Anniversary Symposium!
Knight Center
The Digital Age of Astronomy Panel Discussion: St. Louis Astronomical Society May Meeting
The St. Louis Astronomical Society will be hosting a panel discussion on "The Digital Age of Astronomy" for its May meeting
Wilson 214 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Astronomy on Tap with Nicole Osborn and Nathan Whitsett
Nicole Osborn and Nathan Whitsett, WashU, will be presenting talks for the May Astronomy on Tap
Urban Chestnut Brewery | The Grove Meeting Room
University-Wide Commencement Ceremony
Francis Olympic Field
Graduate Hooding & Recognition Ceremony
Graham Chapel
Scott Rudolph Professor Bradley L. Jolliff Retirement Lecture
Rock of Ages: Timing of Key Events in the Moon’s Geologic Past
Clark-Fox Forum | Hillman Hall
Dissertation Defense: Emily Culley
From Anorthosite to Silicic Volcanics: photometry, composition, and buoyancy of crustal rock types on the Moon
Rudolph Hall Room 301
Physics Theory Seminar with Wenzer Qin on CMB limits on decaying dark matter: going beyond the ionization threshold
Wenzer Qin (Hosted by Chris Cappiello) will be presenting the seminar on CMB limits on decaying dark matter: going beyond the ionization threshold.<br />
<br />
Compton 241 | COFFEE: 2:45PM
Seeing the Universe with Lights, Waves, Particles, and Fridges: Astronomy on Tap
Bhupal Dev and Ephraim Gau, Washington University in St. Louis, will be presenting "Seeing the Universe with Lights, Waves, Particles, and Fridges" for April's Astronomy on Tap
Urban Chestnut Brewery | The Grove Meeting Room
2025 McDonnell Distinguished Lectures: Public Lecture with Priyamvada Natarajan on Unveiling the Invisible Universe
Priyamvada Natarajan, Professor of Astronomy and Physics at Yale University, will present the 2025 McDonnell Distinguished Lectures, "Unveiling the Invisible Universe with the James Webb Space Telescope"
Whitaker 100
2025 McDonnell Distinguished Lectures: Colloquium with Priyamvada Natarajan on the Formation of the First Black Holes
Priyamvada Natarajan, Professor of Astronomy and Physics at Yale University, will present the 2025 McDonnell Distinguished Lectures, Colloquium, "New Insights into the Formation of the First Black Holes"
Wilson 214 | Refreshments in Wilson Hall, 3:15pm
Inaugural Research Pitch Competition
Tansu Daylan, MCSS Fellow and Assistant Professor of Physics, is among the presenters at the inaugural Research Pitch Competition. He will be presenting, "Witnessing the Next Decade of Cosmology in Your Kitchen Glassware."
Knight Center | Anheuser-Busch Dining Room
Beyond Particles: The Elegant Universe of Strings: St. Louis Astronomical Society April Meeting
Megan Dickson, University of Missouri - St. Louis, will be presenting "Beyond Particles: The Elegant Universe of Strings"
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Space Sciences/Astrophysics Seminar with Lia Hankla on Kinetic and Two-Temperature Physics of Black Hole Accretion Disks and Coronae
Lia Hankla (Hosted by Manel Errando) from University of Maryland will be presenting the seminar on Kinetic and Two-Temperature Physics of Black Hole Accretion Disks and Coronae.
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
EEPS Colloquium: Catherine Johnson
The Enigmatic Innermost Planet: A Magnetic Field Perspective
Rudolph Hall | Room 301
Physics Colloquium with Phil Kaaret on "Science Results from the Imaging X-Ray Polarimetry Explorer (IXPE)"
Phil Kaaret (hosted by Henric Krawczynski) from NASA's Marshall Space Flight Center will be presenting on "Science Results from the Imaging X-Ray Polarimetry Explorer (IXPE)" at the Colloquium.
Crow 204 | Coffee: 2:30pm Compton 245
Center for Quantum Leaps Symposium
Knight Center, Classroom 220
Space Sciences/Astrophysics Seminar with Joseph Neilsen on Revealing the Most Extreme Accretion Disk Winds with XRISM
Joseph Neilsen (Hosted by Michael Nowak) from Villanova University will be presenting the seminar on Revealing the Most Extreme Accretion Disk Winds with XRISM.
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
The Life of a Mars Rover: WashU's Connections to Past and Present Missions to the Red Planet
Scott VanBommel, Senior Research Scientist, will be presenting this talk as part of the WashU Wellness Star Trak challenge.
Rudolph 301
Star Trak Observatory Event
Welcome to the Star Trak Observatory Event!
Crow Observatory, Crow Hall
Saturday Science with Sheng Ran on Unveiling material mysteries of the universe
Sheng Ran from the Department of Physics, Washington University in St. Louis, will be hosting this Saturday's Science Lecture, "Unveiling material mysteries of the universe"<br />
Crow 201
Space Sciences/Astrophysics Seminar with Howard Isaacson on Ground-based Radial Velocity Surveys as the Foundation for Future Space Missions
Howard Isaacson (Hosted by Tansu Daylan) from UC Berkeley will be presenting the seminar on Ground-based Radial Velocity Surveys as the Foundation for Future Space Missions.
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
Physics Theory Seminar with Francesca Bonaiti on First-Principles Studies of Nuclear Electromagnetic Observables Relevant for Astrophysics
Francesca Bonaiti (Hosted by Saori Pastore) from FRIB/ORNL will be presenting the seminar on First-Principles Studies of Nuclear Electromagnetic Observables Relevant for Astrophysics
Compton 241 | Coffee: 2:45pm Compton 241
Physics Colloquium with Andrei M. Beloborodov on Magnetars
Andrei M. Beloborodov (hosted by Alex Chen) from Columbia University will be presenting at the Colloquium on Magnetars.
Crow 204 | Coffee: 2:30pm Compton 245
Saturday Science with Tansu Daylan & Bryce Wedig on Seeing the dark with gravitational lensing
Tansu Daylan and Bryce Wedig from the Department of Physics, Washington University in St. Louis, will be hosting this Saturday's Science Lecture, "Seeing the dark with gravitational lensing"<br />
Crow 201
Space Sciences/Astrophysics Seminar with Mükremin Kılıç
Mükremin Kılıç (Hosted by Tansu Daylan) from University of Oklahoma will be presenting the seminar on A Revolution in Stellar Astrophysics, and the Remaining Challenges
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
The Cosmic Mystery and History of Fast Radio Bursts: St. Louis Astronomical Society March Meeting
Duncan Lorimar, West Virginia University, will be presenting a talk for the March St. Louis Astronomical Society meeting, "The Cosmic Mystery and History of Fast Radio Bursts"
Wilson 214 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
EEPS Colloquium: Katherine de Kleer
Jupiter’s volcanic moon Io: Tidal heating, mass loss, and chemical evolution
Rudolph Hall | Room 301
Discover Fast Radio Bursts : Astronomy on Tap
Duncan Lorimer, West Virginia University, will be presenting the Astronomy on Tap lecture, "Discover Fast Radio Bursts"
Urban Chestnut - The Grove
Physics Colloquium with Duncan Lorimer
Duncan Lorimer (hosted by Tansu Daylan) from West Virginia University will be presenting at the Colloquium on The growing population of fast radio bursts.
Crow 204 | Coffee: 2:30pm Compton 245
Space Sciences/Astrophysics Seminar with Rafael Luque on Towards a holistic understanding of sub-Neptunes
Rafael Luque (hosted by Tansu Daylan) from the University of Chicago will be presenting a seminar on Towards a holistic understanding of sub-Neptunes.
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
Weissman Lecture with Dr. Jack W. Szostak from University of Chicago at 11:00am
Please join us for our annual Weismann Lecture Series featuring our guest speaker, Dr. Jack Szostak
McMillen Labs 311
Weissman Lecture with Dr. Jack W. Szostak from University of Chicago at 4:30pm
Please join us for our annual Weismann Lecture Series featuring our guest speaker, Dr. Jack Szostak
Wrighton Hall 300
Saturday Science Lecture with Stella Schindler on Harnessing the strong force
Stella Schindler will be hosting this Saturday's Science Lecture, "Harnessing the strong force: Physics at America's future Electron-Ion Collider"<br />
Crow 201
Physics Theory Seminar with Elena Pinetti on Hunting axions with the James Webb Space Telescope
Elena Pinetti (Hosted by Anastasia Sokolenko) from Flatiron Institute will be presenting at the seminar on Hunting axions with the James Webb Space Telescope.
Compton 241 | Coffee: 2:45pm Compton 241
EEPS Colloquium: Mike Krawczynski
Volcanism and Io: A comparative planetology perspective
Rudolph Hall | Room 301
Physics Colloquium with Pepi Fabbiano on 25 years of Chandra
Pepi Fabbiano (hosted by Mike Nowak) from Chandra X-ray Center will be presenting at the Colloquium on 25 years of Chandra.
Crow 204 | Coffee: 2:30pm Compton 245
Saturday Science Lecture with Michael Ogilvie on Chaos from order, order from chaos
Michael Ogilvie from the Department of Physics, Washington University in St. Louis, will be hosting this Saturday's Science Lecture, "Chaos from order, order from chaos"<br />
Crow 201
Square Kilometer Array (SKA), the Next Big Thing in Radio Astronomy: St. Louis Astronomical Society February Meeting
Michael Malolepszy, St. Louis Astronomical Society, will be presenting “Square Kilometer Array (SKA), the Next Big Thing in Radio Astronomy”
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
EEPS Colloquium: William McKinnon and Ryan Ogliore
Volcanism on Io and the Prometheus Mission
Rudolph Hall | Room 301
Space Sciences/Astrophysics Seminar with Melodie Kao on Comparative Magnetospheric Science: Bridging Planets to Low-Mass Stars
Melodie Kao (hosted by Tansu Daylan) from the Lowell Observatory will be presenting a seminar on Comparative Magnetospheric Science: Bridging Planets to Low-Mass Stars.
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
Space Sciences/Astrophysics Seminar with Lanqing Yuan on Towards an ultimate search for light dark matter with XENONnT
Lanqing Yuan (Hosted by Karthik Ramanathan) from University of Chicago will be presenting the seminar on "Towards an ultimate search for light dark matter with XENONnT"
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
Physics Theory Seminar with Gonzalo Herrera Moreno on New multi-messenger probes of dark matter and the cosmic neutrino background
Gonzalo Herrera Moreno (hosted by Takuya Okawa) from Virginia Tech will be presenting the seminar on New multi-messenger probes of dark matter and the cosmic neutrino background.
Compton 241 | Coffee: 2:45pm, Compton 241
EEPS Colloquium: Marine Denolle
AI as a new paradigm for Geosciences
Rudolph Hall | Room 301
Physics Colloquium with Michael Wiescher on Threshold effects in stellar reaction processes
Michael Wiescher (hosted by Lee Sobotka) from University of Notre Dame will be presenting at the Colloquium on “Threshold effects in stellar reaction processes”
Crow 204 | Coffee: 2:30pm Compton 245
Exploring Stone and Metal: Scott Burton’s Material Choices
Pulitzer Arts Foundation | 3716 Washington Boulevard St. Louis, MO 63108
Physics Theory Seminar with Abigail Lee on The J-region Asymptotic Giant Branch (JAGB) method: An Independent Measurement of the Hubble Constant using Carbon Stars as Standard Candles
Abigail Lee (Hosted by Anastasia Sokolenko) from University of Chicago will be presenting the seminar on The J-region Asymptotic Giant Branch (JAGB) method: An Independent Measurement of the Hubble Constant using Carbon Stars as Standard Candles.<br />
<br />
Compton 241 | COFFEE: 2:45PM
Finding New Physics in Debris from Colliding Neutron Stars: St. Louis Astronomical Society January Meeting
Bhupal Dev, Associate Professor of Physics at WashU, will be presenting “Finding New Physics in Debris from Colliding Neutron Stars”
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
EEPS Colloquium : Scott VanBommel
Dr. Scott VanBommel, Senior Research Scientist, Washington University Earth, Environmental, and Planetary Sciences
Rudolph Hall | Room 301
Postcards from the Moon: St. Louis Astronomical Society December Meeting
Robert Reeves, Lunar Photo of the Day, will be presenting “Postcards from the Moon”
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Physics Theory Seminar with Aurora Ireland on Observable CMB Tensor Modes from Cosmological Phase Transitions
Aurora Ireland (Hosted by Anastasia Sokolenko) from Stanford University on Observable CMB Tensor Modes from Cosmological Phase Transitions<br />
Compton 241 | COFFEE: 2:45PM
Astronomy on Tap with Andrea Gokus and Manel Errando on Quasars and Supermassive Black Holes
Andrea Gokus and Manel Errando, Washington University in St. Louis, will be presenting talks for the December Astronomy on Tap, "Quasars and Supermassive Black Holes: Cosmic Titans Shaping Galaxies."
Urban Chestnut Brewery | The Grove Meeting Room
Space Sciences/Astrophysics Seminar with Aaron Pearlman on Fast Radio Bursts
Aaron Pearlman (Hosted by Yajie Yuan) from McGill University will be presenting the seminar on "Fast Radio Bursts: Illuminating their Origins in the Era of Wide-Field Radio Telescopes"
Compton Hall 241 | Coffee: 10:45 AM at Compton Hall 241
Professor Bruce Fegley Retirement Lecture
Professor Bruce Fegley will give a retirement lecture, 50+ Years in Planetary Chemistry, which will be followed by a reception hosted in Holmes Lounge
Holmes Lounge | Ridgley Hall
Physics Theory Seminar with John W Laiho on Dynamical Dark Energy from Lattice Quantum Gravity
John W Laiho (Hosted by Mark Alford) from Syracuse University will be presenting the seminar on "Dynamical Dark Energy from Lattice Quantum Gravity"<br />
<br />
Compton 241 | COFFEE: 2:45PM
Saturday Science Lecture with Karthik Ramanathan on Understanding the nature of dark matter through terrestrial experiments
Karthik Ramanathan from the Department of Physics, Washington University in St. Louis, will be hosting Saturday's Science Lecture, "Understanding the nature of dark matter through terrestrial experiments"
Crow 201
Dissertation Defense: Christopher Jia-Kuan Yen
Next-Generation Compositional and Chronological Sample Analysis of Lunar Low-Ti Basalts and Volcanic Glasses
Rudolph Hall Room 301
Saturday Science Lecture with L. G. Sobotka on The making of chemical elements from the Big Bang to the laboratory
Lee Sobotka from the Departments of Chemistry and Physics, Washington University in St. Louis, will be hosting Saturday's Science Lecture, "The making of chemical elements from the Big Bang to the laboratory". Please note that this is an in-person only event.
Crow 201
The Case for Mars: St. Louis Astronomical Society November Meeting
Robert Zubrin, PhD, President of The Mars Society, will be presenting “The Case for Mars”
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Physics Theory Seminar with Alejandro Ibarra on Connecting the baryons to the dark matter of the Universe
Alejandro Ibarra (Hosted by Ferrer) from Technical University Munich will be presenting the seminar on "Connecting the baryons to the dark matter of the Universe"<br />
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Compton 241 | COFFEE: 2:45PM
EEPS Colloquium: Prajkta Mane
Rudolph Hall | Room 301
Saturday Science Lecture with Michael Ogilvie on When Forces Collide: Pattern and Structure in our Universe
Michael Ogilvie from the Department of Physics, Washington University in St. Louis, will be hosting Saturday's Science Lecture, "When Forces Collide: Pattern and Structure in our Universe"
Crow 201
EEPS Brown Bag: Kimberly Gerik
Rudolph Hall | Room 301
Physics Theory Seminar with Benjamin Lehmann on Finding primordial black holes wherever they may hide
Benjamin Lehmann (Hosted by Chris Cappiello) from MIT will be presenting the seminar
COMPTON 241 | COMPTON 241 | COFFEE: 2:45PM
Physics Colloquium with Julia Gehrlein on Neutrino windows to the Universe and new physics
Julia Gehrlein (Hosted by Tansu Daylan) from Colorado State University will be presenting the colloquium on "Neutrino windows to the Universe and new physics"
Crow 204 | Coffee: 2:30pm Compton 245
Space Sciences/Astrophysics Seminar with Hannah Gulick on Observing the Transient Sky with All-sky Space-Based Surveys
Hannah Gulick (Hosted by Manel Errando) from UC Berkeley's Department of Astronomy will be presenting a seminar on Observing the Transient Sky with All-sky Space-Based<br />
Surveys
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
EEPS Colloquium: Liam Peterson
Rudolph Hall | Room 301
Astronomy on Tap with Mike Nowak and Bryce Wedig on NASA Space Telescopes
Mike Nowak and Bryce Wedig, Washington University in St. Louis, will be presenting talks for the October Astronomy on Tap.
Urban Chestnut Brewery - The Grove | Bierhall Meeting Room
Leading in a JEDI Space: The Art of Inspiration
Sian Proctor, a professor at Maricopa Community Colleges and an astronaut, will be presenting this talk as part of the WashU Assembly Series.
Graham Chapel
Physics Theory Seminar with Matthew Baumgart on The Future of Thermal Relic Dark Matter
Matthew Baumgart (hosted by Francesc Ferrer) from Arizona State University will be presenting the seminar, "The Future of Thermal Relic Dark Matter"
Compton 241 | Coffee: 2:45pm, Compton 241
Secret Squirrel Stuff: St. Louis Astronomical Society October Meeting
Pamela Gay, PhD, Astronomical Society of the Pacific, will be presenting "Secret Squirrel Stuff"
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Space Sciences/Astrophysics Seminar with Shuo Zhang on A Multi-messenger Hunt for Galactic PeVatrons
Shuo Zhang (Hosted by Manel Errando) from Michigan State University's Department of Physics & Astronomy will be presenting a seminar on "A Multi-messenger Hunt for Galactic PeVatrons"
Compton Hall 241 | Coffee: 8:45 AM at Compton Hall 241
2024 Robert M. Walker Distinguished Lectures: Public Lecture with Harold Levison on Traveling with Lucy on the First Ever Mission to the Trojan Asteroids!
Harold Levison, Institute Scientist, Southwest Research Institute and Principal Investigator of the Lucy mission to tour Jupiter Trojans, will present the 2024 Robert M. Walker Distinguished Lectures, Public Lecture: "Traveling with Lucy on the First Ever Mission to the Trojan Asteroids!"
McDonnell Hall 162
2024 Robert M. Walker Distinguished Lectures: Colloquium with Harold Levison on Lucy: The First to the Trojans
Harold Levison, Institute Scientist, Southwest Research Institute and Principal Investigator of the Lucy mission to tour Jupiter Trojans, will present the 2024 Robert M. Walker Distinguished Lectures, Colloquium: "Lucy: The First to the Trojans"
220 Knight Center | Refreshments: 3:15pm | Knight Center, O'Donnell Lounge
EEPS Brown Bag: Maggie Hinkston/Claire Masteller
Rudolph Hall | Room 301
Space Sciences/Astrophysics Seminar with Regina Caputo on Developments in Gamma-Ray Instrumentation and Telescopes
Regina Caputo (Hosted by Henric Krawczynski & Mike Nowak) from NASA's Goddard Space Flight Center will be presenting a seminar on "Achieving the Science of the Extreme Universe Through Developments in Gamma-Ray Instrumentation and Telescopes"
Compton Hall 241 | Coffee: 10:45 AM at Compton Hall 241
Imaging Seminar: Roger Michaelides
Green Hall | Rodin Auditorium L0120
EEPS Colloquium: Amanda Stadermann
Rudolph Hall | Room 301
Space Sciences/Astrophysics Seminar with John Mehlhaff on Electromagnetic Fireworks Triggered by a Black Hole Feeding on its Magnetized Plasma Corona
John Mehlhaff (Hosted by Alex Chen) from Université Grenoble Alpes will be presenting a seminar on Astrophysical sciences "Electromagnetic Fireworks Triggered by a Black Hole Feeding on its Magnetized Plasma Corona"
Compton Hall 241 | Coffee: 10:45 AM at Compton Hall 241
Physics Theory Seminar with Anastasia Sokolenko on Exploring intergalactic magnetic fields as a window into new physics
Anastasia Sokolenko (Hosted by Das) from Washington University will be presenting the Theory Seminar on "Exploring intergalactic magnetic fields as a window into new physics"<br />
<br />
Compton 241 | COFFEE: 2:45PM
Physics Colloquium with Subir Sachdev on Quantum Entanglement in Nature: High Temperature Superconductors and Black Holes
Subir Sachdev (hosted by Tansu Daylan) from Harvard University will be presenting the annual Feenberg Lecture, "Quantum Entanglement in Nature: High Temperature Superconductors and Black Holes"
Crow 204 | Coffee: 2:30pm Compton 245
Who Discovered the Expanding Universe? Spoiler: Not Hubble!: St. Louis Astronomical Society September Meeting
Joseph Marcus, MD will be presenting "Who Discovered the Expanding Universe? Spoiler: Not Hubble!"
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Physics Theory Seminar with Christopher Cappiello
Christopher Cappiello (Hosted by Bhupal Das) from Washington University in St. Louis<br />
Compton 241 | COFFEE: 2:45PM
EEPS Colloquium: Eileen Martin
Eileen Martin, Colorado School of Mines
Associate Professor, Geophysics and Applied Math and Statistics
Rudolph Hall | Room 301
Physics Colloquium with Manel Errando on Relativistic jets: what happens when black holes reveal their cosmic appetite?
Manel Errando (Hosted by James Buckley) from Washington University in St. Louis will be presenting on "Relativistic jets: what happens when black holes reveal their cosmic appetite?"
Crow 204 | Coffee: 2:30pm Compton 245
International Observe the Moon Night
Join us to celebrate International Observe the Moon Night
Rudolph 301 AND Crow Observatory
EEPS Colloquium: Bethany Ehlmann
Rudolph Hall | Room 301
EEPS Colloquium: Paul Byrne
Rudolph Hall | Room 301
EEPS Colloquium: Bronwen Konecky
Rudolph Hall | Room 301
How We Stacked a Space Shuttle in Downtown L.A.: St. Louis Astronomical Society August Meeting
Bradley Tsalyuk, Exhibit Designer from the Samuel Oschin Air and Space Center of the California Science Center will be presenting "How We Stacked a Space Shuttle in Downtown L.A."
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Public Lecture with Robin Canup on The Origin of the Moon
Robin Canup, Vice President, Solar System Science and Exploration Division of Southwest Research Institute, will present a public lecture, "The Origin of the Moon," as part of the NASA Exploration Science Forum
Graham Chapel
2024 NASA Exploration Science Forum
The NASA Solar System Exploration Virtual Institute (SSERVI) is pleased to announce the 2024 NASA Exploration Science Forum will be held on July 23-25, 2024 at Washington University in St. Louis
Knight Center, Washington University
Io During the Juno Epoch: St. Louis Astronomical Society July Meeting
Dr. Ashley Gerard Davies from the Jet Propulsion Laboratory will be presenting “Io During the Juno Epoch” at the July meeting of the Saint Louis Astronomical Society.
McDonnell 162 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.
Astronomy of the Inka Empire: St. Louis Astronomical Society June Meeting
Steven R. Gullberg from University of Oklahoma will be presenting "Astronomy of the Inka Empire"
Wilson 214 | Also available on Zoom. Contact the St. Louis Astronomical Society for the link.