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A Scientist Who Found Her Faith In Physics: Meet Katie Mack, AKA AstroKatie

picture of Katie Mack staring up immersed in stars
courtesy of Katie Mack

Many kids take things apart to figure out how they work. They stare up at the stars and wonder how the universe functions. As a young child, Katie Mack did that too. But she eventually took that curiosity to the next level, and her childhood fascination led to a career in astrophysics.

Mack met Stephen Hawking, who inspired her to become a cosmologist. She also followed in the footsteps of her own grandfather, who had worked on the Apollo 11 mission and attended Caltech.

Mack also sought answers to life’s biggest questions through religious practice. She spent time in theology school and always hoped to find faith but eventually realized that route was not quite the one for her.

Mack continued on with her study of science, and now is a professor in the physics department at North Carolina State University, where she focuses on understanding the universe from beginning to end. She is currently writing a book exploring theories about how the universe may end. Host Frank Stasio talks with Katie Mack, well-known on Twitter as @AstroKatie, about black holes, dark matter and whether aliens exist.

Note: This segment originally aired July 9, 2018.

Interview Highlights

On how the universe probably won’t end with the big crunch theory:

There are other ways for the universe to end. It doesn’t have to end by it all collapsing again. If the universe is expanding forever and constantly accelerating in its expansion, which is what looks like will happen, the universe comes to an end in the sense that everything in the universe decays and dies. That’s called the heat death.

On her search for faith:

I didn’t have faith per se. I had a lot of trouble believing in anything that I didn’t have strong evidence for. It comes back to the scientific view point maybe. I didn’t have religious experiences. I didn’t have a feeling of connection with the divine. I wanted that feeling of connection … I found the practice very meaningful, but I never got the faith.

On the challenge of undergrad at California Institute of Technology:

The work was hard. The other students were very talented. One of the things that happens at a place like Caltech is you have to be within the top 10 percent of your class, usually much higher, to get into Caltech. Then once you’re there, everybody’s used to being at the top … I was used to getting straight A’s. At Caltech it was a tough place.  

photo of Stephen Hawking and Katie Mack at the dinner table.
Credit courtesy of Katie Mack
Katie Mack poses with the man who inspired her to become a cosmologist - Stephen Hawking.

On having Stephen Hawking attend her lecture:

They were like, “yeah, come give a lecture during the cosmology lunch.” So I’m like, “OK I guess I can do this. I’m scared but I will do this.” The reason I was scared is because this is the lunch Stephen Hawking goes to. I knew that there was a possibility he would be there ...  Just as I’m getting ready to show my title slide I hear this beeping as his chair is rolling in.

On her grandfather working with Apollo 11:

He was very involved in Apollo 11 in a really big way. He actually, in some sense, saved the lives of the Apollo 11 astronauts ... At some point he was assigned to do the weather for the Apollo 11 mission, specifically the splashdown phase … It’s really important as it comes down through the atmosphere it doesn’t encounter a big storm … and so he was in charge of making sure the landing site was OK. It looked fine, but he also had access to secret spy satellites from the Cold War that he knew had better data ... He had that secret clearance and NASA did not … Turned out there was a huge storm right where the landing site was supposed to be … It would have killed everyone on impact with the ocean … And so my grandfather had to go back to NASA and say, “You have to move the landing site. I can not tell you why.”


Dana is an award-winning producer who began as a personality at Rock 92. Once she started creating content for morning shows, she developed a love for producing. Dana has written and produced for local and syndicated commercial radio for over a decade. WUNC is her debut into public radio and she’s excited to tell deeper, richer stories.
Longtime NPR correspondent Frank Stasio was named permanent host of The State of Things in June 2006. A native of Buffalo, Frank has been in radio since the age of 19. He began his public radio career at WOI in Ames, Iowa, where he was a magazine show anchor and the station's News Director.
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