
We live in a golden age of astronomical discovery, propelled by cutting-edge observatories collecting data across the electromagnetic spectrum. The revolutionary Hubble and Webb space telescopes, for instance, focus on the optical and infrared wavelengths, while a suite of no-less inventive terrestrial instruments, designed, deployed, and operated by the Charlottesville-based National Radio Astronomy Observatory (NRAO), concentrates on radio emissions. These have the lowest energies, longest wavelengths, and lowest frequencies of any type of radiation.
“By combining evidence from these different sources, scientists gain a more complete picture of phenomena in the universe,” says NRAO Director Anthony Beasley. “At the same time, investigations at each segment of the spectrum produce discoveries in their own right.” For example, scientists using NRAO’s telescopes have determined that black holes seed the formation of galaxies, not the other way around—and identified a cosmic hole of a different sort—a giant void a billion miles across that is empty of stars, galaxies, gas, and dark matter.
Driving the Technology
Audacity of engineering is one reason NRAO’s telescopes have produced such groundbreaking discoveries. The surface of the 100-meter dish of the 8,500-ton Robert C. Byrd Green Bank Telescope in West Virginia is virtually flawless, giving scientists the ability to identify molecules at a point in deep space with unmatched sensitivity.
NRAO researchers have also harnessed advances in interferometry to mesh data from multiple dish-antennas, allowing them to examine emissions from a broader slice of universe. The 27 telescopes that make up the Very Large Array (VLA) in a remote New Mexican desert are arranged along a Y-shaped track, effectively forming a telescope 20 miles in diameter. NRAO went a step further in 1993 by creating a continent-spanning observatory, the Very Large Baseline Array (VLBA), comprising a group of 10 telescopes that stretch from Hawaii across the continental U.S. territory to the Virgin Islands. NRAO then partnered with an international coalition to build the Atacama Large Millimeter/submillimeter Array (ALMA), which consists of 66 dish-antennas deployed at 16,500-feet in the dry Chilean desert, an environment hostile to life but ideal for detecting faint radio signals. ALMA began scientific observations in 2011 and is considered the best radio telescope in the world.
But for Beasley, best is a moving target. “Whatever the project, we’re always trying to push the instruments harder to make better observations, even if that means taking them apart and modifying them,” Beasley says. “As director, that’s always been a big priority for me.”
Building an Organizational Foundation
NRAO’s effectiveness, however, owes as much to its ability to manage the disparate teams building and operating these complex, often decentralized engineering projects as it does to its scientific and engineering prowess. Beasley has played a critical role in advancing NRAO’s ability to tackle ever-more complicated initiatives.
Beasley was first exposed to a radio telescope as a graduate student at the University of Sydney. There is a long tradition of radio astronomy in Australia, and Sydney Uni’s School of Physics operates its own observatory. “Being able to put my hands on an instrument right at the beginning of my career had a huge influence on me,” Beasley says. By the 1960s the United States had moved ahead—and Beasley joined NRAO in 1991 as a postdoctoral fellow working on the VLA. He remained with NRAO, with time out for short stints at other organizations, for most of the next 25 years.
Beasley’s scientific interests include nonthermal stellar radio emissions, very long baseline interferometry techniques, radio supernovae, and astronomy of stellar/interstellar masers (the microwave analog of lasers)—and he played a critical role in the commissioning and completion of the VLBA. “As someone interested in very long baseline science, bringing the world’s best long baseline telescope into operation was a great opportunity.”
The longer Beasley worked at NRAO, the more he gravitated to leadership positions. “It was apparent to me from my earliest days at university that I had some ability to be able to organize things and get a group of people to march in one direction,” he says. “I think we all need to look at where we can have the most impact.”
Expanding His Skill Set
At times, this philosophy has led Beasley to leave NRAO. “There is value in steeping yourself in institutional knowledge and staying with one organization,” he says. “There is also value in going out and seeing how other organizations do things and gain a different set of experiences.”
In 2000, Beasley became project manager for the 23-antenna Combined Array for Research in Millimeter-wave Astronomy in California, a precursor to ALMA. He returned in 2004 as assistant director and project manager for ALMA, rebuilding and strengthening the collaborative relationships that were essential to its ultimate success. Beasley then left again in 2008 to become chief operating officer and project manager for the National Ecological Observatory Network, now a collection of over 80 field sites across 20 ecoclimatic domains. “Although the science is very different, there were a lot of technical parallels with instruments like the VLBA,” he says.
In 2012, Beasley returned to NRAO as director, a post he has held ever since. “I keep coming back to NRAO because we run the best telescopes in the world, and the scale of operations is massive,” he says. “I can’t imagine a more interesting and intellectually demanding environment.” For his achievements over his career, Beasley was elected a fellow of the American Association for the Advancement of Science in 2021.
Looking Ahead
Looking forward, Beasley sees no shortage of challenges. He is deeply involved in laying the groundwork for the Next-Generation Very Large Array (ngVLA), which will consist of 244 antennas spread across 5,500 miles. He also shepherding the process of developing a high-power radar at the Green Bank Observatory for use in both planetary science and surveillance applications. “One of my goals as NRAO director is making sure people appreciate both the pure research and the real-world applications of our instruments,” he says.
At the same time, Beasley is proud of what he has accomplished. “We are passing through an amazing time during which our observatories, both ground and space-based, are capable of exploring the universe to the very edge of the Big Bang,” he says. “I am very proud to have helped build some of the instruments responsible for these advances.”