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Astronomers are announcing today that they have disproved a 2018-announced planet orbiting Barnard's Star, the second-closest star to our Sun. The findings, based on observations with the Habitable Zone Planet Finder (HPF) instrument on the 10-meter Hobby-Eberly Telescope at The University of Texas at Austin's McDonald Observatory, have been accepted for publication in The Astronomical Journal.

Two UT Austin postdoctoral scientists, Brianna Lacy and Yifan Zhou, have received the 51 Pegasi b Fellowship from the Heising-Simons Foundation, which will provide them with support for research focused on planets that orbit a star outside our solar system, known as exoplanets. Zhou is supervised by Brendan Bowler, an assistant professor of astronomy, and Lacy will be supervised by Caroline Morley, also an assistant professor of astronomy.

An international team of astronomers has used NASA's Transiting Exoplanet Survey Satellite (TESS) and retired Spitzer Space Telescope to discover what may be the first intact planet found closely orbiting a white dwarf, the dense leftover of a sun-like star only 40% larger than Earth. The work, led by Andrew Vanderburg of The University of Texas at Austin, included follow-up observations with the 10-meter Hobby-Eberly Telescope at the university's McDonald Observatory.

A team of astronomers including McDonald Observatory's Bill Cochran have made a detailed study of a young planet slightly smaller than Neptune with the Habitable-zone Planet Finder at The University of Texas at Austin's McDonald Observatory. They characterized the planet's mass, radius, and the tilt of its orbit. This work provides insight into how such planets form and evolve, and has been accepted for publication in the Astronomical Journal.

An international team of astronomers including Stella Offner of The University of Texas at Austin has proposed a new method for the formation of aluminum-26 in star systems that are forming planets. Because its radioactive decay is thought to provide a heat source for the building blocks of planets, called planetesimals, it's important for astronomers to know where aluminum-26 comes from. Their research is published in the current issue of The Astrophysical Journal.

Jupiter-size planets orbiting close to their stars have upended ideas about how giant planets form. Finding young members of this planet class could help answer key questions. For most of human history our understanding of how planets form and evolve was based on the eight (or nine) planets in our solar system. But over the last 25 years, the discovery of more than 4,000 exoplanets, or planets outside our solar system, changed all that.

In these next few decades, will humans finally find life in space? We asked University of Texas at Austin astronomer Caroline Morley and her answer just might surprise you. Morley shares her vision for the future in this latest episode of our miniseries, The Next 50 Years.

Fritz Benedict has used data he took over two decades ago with Hubble Space Telescope to confirm the existence of another planet around the Sun's nearest neighbor, Proxima Centauri, and to pin down the planet's orbit and mass. Benedict, an emeritus Senior Research Scientist with McDonald Observatory at The University of Texas at Austin, will present his findings today in a scientific session and then in a press conference at a meeting of the American Astronomical Society.

​Scientists from across The University of Texas at Austin are joining forces in the hunt for life on other planets. Astronomers, geoscientists, chemists, biologists and aerospace engineers have pooled resources to form the UT Center for Planetary Systems Habitability, a cross-campus, interdisciplinary research unit.