Mapping the Stars: An Interview with Reilly Bova ’20

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Reilly Bova ’20 is a Bachelor of Science and Engineering (B.S.E) Computer Science (COS) major with a strong interest in Physics. He spent this past summer conducting research in Princeton’s Physics department. His work included the visualization of deep universe galaxy clusters.

A snapshot from Reilly’s work of the Cosmic Microwave Background projected onto the edge of the observable universe.

Reilly took data on some of the oldest and farthest discovered galaxies (several billion light-years away) and mapped them onto a computational model of the observable universe. He also added to the visualization extremely precise maps of the Cosmic Microwave Background (CMB), which is radiation from about 380,000 years after the Big Bang. Right after the Big Bang, the universe was so hot that nothing—not even photons—could travel unimpeded, which rendered the universe opaque. Around year 380,000, the universe had cooled enough that neutral atoms could form, rendering it transparent (i.e., photons could now travel through it) and releasing an enormous amount of energy which we now call the CMB. This Cosmic Microwave Background has been traveling through the universe for billions of years. As the universe expands, the wavelength of the CMB radiation lengthens (i.e., “redshifts”). We can generate a map of what the universe looked like very early in its life by measuring  these redshifts.

I recently had the exciting opportunity to interview Reilly and find out more about his research experience.

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Rocky trails: Researching what matters to you

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Climbers using fixed anchors in Arches National Park

How would you like to travel to six of the country’s most famous National Parks for your senior thesis?

My friend Eve Barnett, a senior in the politics department, did just that. Eve, who also leads Outdoor Action trips and rock-climbs with the Princeton Climbing Team, found a way to combine her academic training with her love of the outdoors. Her thesis focuses on how the Park Service addresses a controversial issue within the climbing community: fixed anchors, metal bolts pushed into a cliff face for climbers to clip into. Should they be allowed in National Parks because they increase access, or banned because they’re a permanent change to the rock face? I sat down with Eve to learn more about her research journey.

How did you decide on a research topic? Was it related to your previous independent work?

It was totally unrelated! My fall JP was about international ocean conservation commissions, and my spring JP was about the different political experiences of high-income and low-income college students. I asked my thesis adviser what he thought about continuing with the college student project, but he recognized that it wasn’t really my project since it was a small portion of a professor’s ongoing research. He told me he believed my thesis topic should be something I have ownership of. So I started thinking, what do I love?

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