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A cosmic scene with bright stars and nebulae, overlaid with the logos of the American Museum of Natural History and NASA, and text: Eric Andersson, The Star-by-Star Formation of the Smallest Galaxies.

July 7, 2025

The star-by-star formation of the smallest galaxies

Eric Andersson, American Museum of Natural History

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

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.