Weinberg Institute for Theoretical Physics

Researching at the intersection of astrophysics, cosmology, gravitational physics and high-energy physics.


A telescope enclosure sits in front of two mountains under a blue sky


Postcards from the Field: First Light for a New High-Desert Telescope

Scientists at the Simons Observatory in Chile, including Katie Freese and Nick Galitzki, probe the cosmic microwave background for clues about the history of the early universe.

Gravity Research Foundation

Fischler Wins Gravity Research Foundation Essay Award

Illustration of a supermassive black hole wth millions to billions times the mass of our sun. Image credit: NASA/JPL-Caltech


QnAs with Katherine Freese

Photo by Marcia Rosengard

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