Fraser Cain

My guest today is Dr. Surjeet Rajendran, a physics professor at Johns Hopkins University. In addition to his teaching, Dr. Rajendran's research is in theoretical physics, with a strong focus on what comes after the standard model. What could dark matter be? How can gravity be merged with quantum mechanics?

In this week's questions show, I explain how other planets can have geostationary orbits, if sending tardigrades to the Moon is a violation of the Outerspace Treaty, and why everything orbiting the Sun is in perfect balance.

My guest today is Dr. Thayne Currie, an astrophysicist at NASA-Ames Research Center and the Subaru Telescope. Dr. Currie was part of a team that directly imaged a newly-forming planet, providing evidence of another way large planets can form, and could have formed here in the Solar System.

My guest today is Dr. Robin Hanson, an associate professor of economics at George Mason University and a research associate at the Future of Humanity Institute of Oxford University. Dr. Hanson is famous for writing a paper describing the Great Filter, a theory that explains why we don't see aliens across the Universe.

My guest today is Chris Prophet, a freelance writer who has been covering the rise of SpaceX. He has written several books, including SpaceX from the Ground Up. His new book is called SpaceX Evolution and explains some of the company's long-term strategies to create a sustainable human civilization on Mars and beyond.

In this week's live Questions and Answers show, I explain how big black holes are, what coordinate system astronomers use to map objects in the sky, and what could have collapsed clouds of hydrogen to form the first stars?

In this week's questions and answers show, I answer the question: could we build a star? How far will humans realistically explore within the Solar System? Is there any way we can escape the heat death of the Universe?

In this week's live Questions and Answers show, I explain how a more powerful rocket could reduce the need of a heat shield, if we could detect objects beyond the edge of the observable Universe through their gravity, and what are the largest objects (or spacecraft) that could hang out at a Lagrange Point?

My guest today is Dr. Jason Hofgartner, a planetary scientist specializing in icy worlds of the Solar System. Jason wrote a recent paper about the nature of Neptune's moon Triton, first discovered by Voyager 2 back in 1989.

In this week's Questions and Answers show, I explain how astronomers use the Doppler Effect to know if objects are moving towards or away from us, I give my thoughts on Starlink as a user, and I suggest ideas on how to become a better writer.

My guest today is Matthew Campbell, a Mechanical Engineer, Postdoctoral Researcher at the Department of Mechanical Engineering and Applied Mechanics at the University of Pennsylvania. He's a member of the Bargatin Group, researching nanomaterials and their applications.

My guest today is Dr. John Mather, Senior Astrophysicist in the Observational Cosmology Laboratory at NASA's Goddard Space Flight Center. Dr. Mather received a Nobel Prize for his influential cosmology work, helping to confirm the Big Bang. He's been involved in almost every major astronomy mission in the last few decades, including Hubble, and of course, James Webb.

My guest today is Dr. Elena D'Onghia, an associate professor at the University of Wisconson--Madison's Department of Astronomy. Her research is focused on the dynamics of galaxies through simulations, theory, and observations.

In this week's episode, I explain how we could use Jupiter as a source of fuel for our fusion reactors, what it means to say there's a scientific consensus, and if gravitational waves can trigger earthquakes.

In this week's questions show, I explain how astronomy would be different if we didn't have space telescopes, what was the Universe like shortly after the Big Bang?, and what if James Webb detects oxygen in the atmosphere of another planet?

My guest today is Dr. Chenoa Tremblay, a Post Doctoral Researcher at the SETI Institute. Dr. Tremblay and her team used the Murchison Widefield Array to scan the core of the Milky Way for any sign of signals from extraterrestrial civilizations.