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This summer the Department of Physics welcomed an astrophysicist whom Global Citizen put on a list of the "17 Top Female Scientists who have Changed the World," alongside names like Jane Goodall and Marie Curie.

In findings published today in The Astrophysical Journal, University of Texas at Austin astronomers report that they have stumbled on an extraordinary galaxy that may corroborate a recently contested theory about dark matter.

A University of Texas at Austin astronomer has published a commentary in the journal Science noting that a new study on the movement of galaxies has the potential to either reinforce or change our understanding of how dark matter contributes to the motion of galaxies.

The world's third-largest telescope, the 10-meter Hobby-Eberly Telescope (HET) located at McDonald Observatory in West Texas, has completed a multiyear $40 Million upgrade to enable it to take on the biggest challenges in astronomy today: unraveling the mystery of dark energy, probing distant galaxies and black holes, discovering and characterizing planets around other stars and much more. The HET Board is celebrating with a dedication ceremony today.

One year ago, an international team of scientists detected the first direct evidence of gravitational waves. UT Austin astronomer Karl Gebhardt recently sat down with the Houston Chronicle's Kim McGuire to talk about his work, which focuses on both black holes and dark energy. He also reflected on the significance of the gravitational wave discovery.

Physicists have hypothesized the existence of fundamental particles called sterile neutrinos for decades and a couple of experiments have even caught possible hints of them. However, according to new results from two major international consortia, the chances that these indications were right and that these particles actually exist are now much slimmer.

​Dr. Can Kilic, an assistant professor and researcher in the Department of Physics at The University of Texas at Austin, specializes in theoretical particle physics, the Standard Model, and dark matter models. Dr. Kilic sat with the UT Physics newswriting team to discuss his research, his teaching, and his hopes for the future of science.

This is the second of a three-part series on general relativity.

Einstein's Theory of General Relativity, which describes how gravity works, turns 100 this month. The theory has successfully explained a lot of what we observe out in the universe; but there are signs that it's incomplete. In the 1990s, astronomers observed that the expansion of the universe is speeding up, as if some mysterious force is pushing everything apart faster and faster. Nearly 20 years later, one of the biggest unanswered questions in science is: what is this dark energy? Not only was dark energy not predicted by general relativity, but its mere existence might mean that the theory needs to be tweaked or even replaced.

Leaders and supporters from The University of Texas at Austin's McDonald Observatory, along with representatives from an international group of partner universities and research institutions, are gathering on a remote mountaintop high in the Chilean Andes today to celebrate groundbreaking for the Giant Magellan Telescope (GMT).

After several years and a massive team effort, one of the world's largest telescopes has opened its giant eye again. The Hobby-Eberly Telescope (HET) at The University of Texas at Austin's McDonald Observatory has completed a $25 million upgrade and, now using more of its primary mirror, has achieved "first light" as the world's third-largest optical telescope.