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A close-up image of the Sun shows a dramatic solar eruption with bright, swirling plasma and vivid orange, yellow, and red colors, illustrating intense solar activity and dynamic magnetic fields.

March 18, 2025

Current Sheets and Plasmoid Instability

Amitava Bhattacharjee, Princeton University

An artistic illustration of a lander on an icy moon鈥檚 surface, drilling down with sonar-like waves, with a distant spacecraft and a large planet with swirling clouds in the colorful sky above.

January 17, 2025

Exploring the Habitability of the Solar System鈥檚 Ocean Worlds

Steven Vance, JPL Science, NASA

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.