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A vivid, red-hued view of the Milky Way鈥檚 center, featuring countless stars, glowing gas clouds, and dark dust lanes against a dark background, captured by a space telescope.

June 17, 2025

Infrared Observations of the Galactic Center

Sebastiano Von Fellenberg, University of Toronto

An illustration of a Wolf-Rayet star with a magnetar at its center, surrounded by a mildly relativistic shockwave and emitting highly relativistic jets from its poles. Labels indicate each part.

April 16, 2025

Nuclear Reactions Induced by Pre-breakout Shock Passage in BNS Merger Ejecta

Amir Levinson, Tel Aviv University

A bright spiral galaxy viewed from above in space, with a highlighted red beam pointing outward from its center and a circular marker around the galaxy鈥檚 core.

March 17, 2025

The Microlensing Planet Landscape on the Eve of Roman

Jennifer Yee, Harvard University

A woman with shoulder-length brown hair, wearing a black jacket, a black and white floral scarf, and a silver necklace, smiles in front of a light-colored brick wall.

November 17, 2017

Sackler Lecture: Einstein’s Waves: New Cosmic Sounds

One century following Einstein's prediction of spacetime disturbances and gravitational waves, the laser-enabled special detectors LIGO achieved the most accurate measurement ever made by humans across science and engineering and revealed to us the gravitational-wave signals produced by the most powerful collisions of black holes in the universe. These revolutionary discoveries have given birth to a brand new field of astronomy, a completely new way of sensing the cosmos and exploring its darkest corners. I will review the first direct detections of gravitational waves and what they can teach us about the nature of black holes and other exotic cosmic events.