Frank Barnet
Frank Barnet. Image credit: Frank Barnet


Riverside High School, Buffalo, New York
Canisius College, Buffalo, New York
University of Notre Dame, Notre Dame, Indiana
Ph.D. in Mathematics

What motivated you to volunteer as a NASA citizen scientist? How did you learn about NASA citizen science?

I became a citizen scientist volunteer for Planet Hunters Kepler in December of 2010. I had read about that project on and began classifying stars’ light curves on the very first day that the project went live. It excited me to have the opportunity to help find an exoplanet right from my own armchair! A longtime “Star Trek” and “Star Wars” fan like me could not ask for a better deal.

I classified light curves for a year, looking for those telltale dips in brightness that might indicate a transiting exoplanet, but the demands of my day job as a math professor made it difficult for me to continue, so I left planet hunting for a while. That “while” turned into eight years.

Then I learned, around December of 2018, of citizen science project Planet Hunters TESS, which was using the data from the then brand-new TESS, or Transiting Exoplanet Survey Satellite. I started classifying light curves again and have continued since then.

What do you do when you’re not doing science with NASA? Tell us about your job and your hobbies.

I teach mathematics at Frostburg State University in Frostburg, Maryland. When I'm not teaching math or hunting for planets, I enjoy streaming opera or a Shakespeare play.

Gira Center
The Gira Center, the building where Frank teaches in the Department of Mathematics of Frostburg State University. Credit: Frank Barnet

What have you learned about the process of science from your time on NASA citizen science projects?

With Planet Hunters Kepler and Planet Hunters TESS, I have learned about the fascinating and thorough work that researchers must do in order to take a dip in a star's light curve and validate it as an exoplanet, and then publish the result in a peer-reviewed journal.

For Planet Hunters TESS, the process begins with us, the volunteers, who flag potential planetary transits in the data. But that’s just the beginning. Many of those potential transits, for a variety of reasons, are false positives, and many of the genuine ones have already been found by the computer algorithms that professional astronomers use.

To find a truly new exoplanet in the TESS data, the Planet Hunters project leaders must select the best transit candidates for further study with a battery of tests. But perhaps the most important test involves spectrography, or using ground-based telescopes to split up the light of the target star for further study. Kind of like the way a raindrop produces a rainbow from sunlight. The star’s spectrum – its “rainbow,” so to speak – can tell us about the gravitational tug of an exoplanet on that star, confirming the planet’s existence to almost a statistical certainty.

Which peer-reviewed research publications have you contributed to through your citizen science work? What was your role in the research and writing process?

I am a co-author in two papers: Planet Hunters TESS I: TOI 813, a subgiant hosting a transiting Saturn-sized planet on an 84-day orbit, published in 2020 in the “Monthly Notices of the Royal Astronomical Society,” and TOI-1338: TESS' First Transiting Circumbinary Planet, published in 2020 in “The Astronomical Journal.”

For the first paper, I was one of the citizen scientists who flagged down the transit event that led to the discovery of TOI 813. For the second paper, I was one of the citizen scientists who classified a TESS light curve as an eclipsing binary star system. This later led to the discovery by 17-year old NASA intern Wolf Cukier of an exoplanet orbiting two stars, the first such planet found by TESS.

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