Artwork for Ask a Spaceman!

Ask a Spaceman!

Paul M. Sutter
Natural SciencesScience

What would happen if you fell into a black hole? How big is the universe? Just what the heck is a quasar, anyway? You've got questions, and astrophysicist Paul Sutter has the answers! Submit questions via Twitter using #AskASpaceman or post to Every week you will come closer to COMPLETE KNOWLEDGE OF TIME AND SPACE!


Do you want to know how many people listen to Ask a Spaceman!? Or perhaps how many downloads it gets? Rephonic has scanned the web and collated all the information we found in our podcast database.

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Latest Episodes

How big can a rocky planet get? Can a rocky planet turn into a gas giant? Why are some planets rocky and others gassy? I discuss these questions and more in today’s Ask a Spaceman! more

10 days ago

How do giant black holes shut off star formation? How do they turn it back on? Which came first, the black hole or the galaxy? I discuss these questions and more in today’s Ask a Spaceman! more

24 days ago

How did gravity get so ridiculously weak? Could it be related to extra dimensions? What does string theory and the concept of the “bulk” have to do with it? I discuss these questions and more in today’s Ask a Spaceman! more

a month ago


4.8 out of 5 stars from 874 ratings
  • Amazingly insightful!

    Awesome how Dr. Sutter is able to explain some of the most difficult concepts in an amazingly simple way. Just listening to just a few episodes won’t do justice. Listening to as many as I can has made a huge difference in expanding my breadth of astronomy knowledge. Thank you and please keep doing this forever!

    Apple Podcasts
    Canadaa month ago
  • You will love the energy of this podcast

    Ask a Spaceman provides a fascinating dive into an interesting aspect of physics in each episode while giving you the historical perspective of how our knowledge evolved.

    Apple Podcasts
    United States2 months ago
  • Entertaining Educational and Exceptional

    This podcast will not disappoint. You will really be happy you picked this one. Paul’s thoughtful approach to simplifying the complexities the universe has offer is only exceeded by his sense of humor. His earnest delivery style and topic selections make these episodes ones I look forward to and usually repeat once or twice. Top 5 podcasts on offer… period.

    Apple Podcasts
    United States2 months ago
  • Another "blow your mind by your own risk" episode. A great one by the way. Thanks a lot!

    Anderson Galvao
    2 months ago
  • Good mind exercise. Thanks for the show. By the way, you are an excellent science communicator.

    Anderson Galvao
    2 months ago

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How many episodes of Ask a Spaceman! are there?

Ask a Spaceman! launched 7 years ago and published 184 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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