Exploring the Solar System’s Untapped Mysteries
While astronomers often gaze toward the distant cosmos, a wealth of scientific mysteries lies just beyond our doorstep in the solar system. This realm, full of enigmatic objects and processes, offers significant insights into the universe and our own planet.
With a research focus sticking “close to home,” Dr. Kareta encourages his students to consider the mysteries still to be answered in our own solar system.
Advancements in technology have enabled astronomers to peer into the depths of the universe, but the focus on distant galaxies may cause us to overlook the mysteries closer to home. Dr. Teddy Kareta, an assistant professor of Astrophysics and Planetary Science at Villanova University, emphasizes the importance of understanding our own solar system as a foundation for broader cosmic knowledge. “There are always going to be more news stories about things that are further out, fainter and earlier in time,” said Dr. Kareta. “But, if you want to understand those things, you have to understand what happens within.”
Dr. Kareta’s journey into solar system astronomy began during his undergraduate studies at UMass Amherst, where he was captivated by a lecture from solar system researcher Peter Schloerb, PhD. This pivotal moment sparked his interest in the basic yet profound questions surrounding our celestial neighborhood.
Dr. Kareta became deeply interested in solar system astronomy after attending a lecture by one of his astronomy professors.
Dr. Kareta reflects on how the age of Earth and the formation of the Moon remain uncertain, prompting a reevaluation of our understanding of planetary evolution. He ponders questions that have persisted since the times of Newton and Laplace, such as Earth’s trajectory and the solar system’s stability. Recent discoveries about Venus’ atmosphere suggest it may have once been habitable, challenging assumptions about our planetary neighbor.
Examining the sources of Earth’s oceans raises fundamental questions that are still debated among scientists. “Did Earth form with accumulated rocks that had some water in them, or was it delivered later? If later, by what—comets, or asteroids?” Dr. Kareta asks. These discussions highlight the ongoing mysteries within our solar system.
Part of the appeal of studying the solar system, Dr. Kareta says, is that it allows him to study things that we can see—even feel—here in our daily lives on Earth.
Seizing Rare Research Opportunities
In July 2025, a survey telescope identified a fast-moving object in the inner solar system, later confirmed as an interstellar comet named 3I/ATLAS. This discovery generated excitement among scientists and the public, providing a limited window for study before the comet vanished. Dr. Kareta, having previously studied another interstellar object, 2I/Borisov, recognized the urgency of this opportunity.
Hannah Bohlsen’s project looking at the carbon compounds of comets was inspired by the 2025 interstellar object 3I/ATLAS, which passed through our solar system that summer.
Dr. Kareta highlights the unique nature of solar system research, where fleeting events require swift data analysis and dissemination. This approach provides students with invaluable experience, as they become experts in novel areas of study. One such student, Hannah Bohlsen, has embarked on a project examining the carbon compounds of comets, inspired by 3I/ATLAS.
Bohlsen’s work involves analyzing cometary carbon content and orbital data to understand their origins and the environments in which they formed. Her research, presented at the NASA Delaware Space Grant Consortium, has earned her recognition, including the “Jason A. Cardelli Memorial Award for Undergraduate Research” from Villanova’s Department of Astrophysics and Planetary Science.
As Bohlsen prepares for advanced studies in galactic archaeology, she acknowledges the impact of her solar system research on her academic journey. Dr. Kareta emphasizes to students the importance of investigating our cosmic backyard, as discoveries made here can inform our understanding of distant systems.
“There is a kind of way that we talk about the solar system as if it’s just our backyard,” Dr. Kareta noted. “It goes to show, just because it’s our backyard doesn’t mean it’s not worth the investigation.”
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