The Atacama Cosmology Telescope

The goals of the ACT project are to study how the universe began, what it is made of, and how it evolved to its current state. This pursuit is part of the field of scientific cosmology in one which asks questions about the Universe on the largest and grandest scales. Over the past two decades, there has been a tremendous flourishing of the field, driven by many excellent astronomical measurements. This has led to the development of a precise and elegant understanding of cosmology.

ACT Data Release 4 (DR4)

In the news

Tuesday, Mar 16, 2021

Berkeley Lab physicists play a key role in studies that solve a cosmological mystery. Read more.

Monday, Mar 15, 2021

Using light from the Big Bang, an international team led by Cornell and the U.S. Department of Energy’s Lawrence Berkeley National Laboratory has begun to unveil the material which fuels galaxy formation. Read more.