Uploaded November 2025 | Updated September 2026, 3 weeks ago
Support the show: patreon.com/pmsutter
As far as we can tell the universe is geometrically flat and topologically simple. But does this mean its infinite? What about the cosmological horizons, the limits to what we can see? Will we ever know for sure?
0:00 - Intro
2:18 - No Edge, No Center
7:24 - Life in the Bubble
12:10 - To the Horizon
18:06 - The Shape of Space
24:20 - Outro
Written and hosted by Paul M. Sutter
Editing by Poncho Productions
Support the show: patreon.com/pmsutter
As far as we can tell the universe is geometrically flat and topologically simple. But does this mean its infinite? What about the cosmological horizons, the limits to what we can see? Will we ever know for sure?
0:00 - Intro
2:18 - No Edge, No Center
7:24 - Life in the Bubble
12:10 - To the Horizon
18:06 - The Shape of Space
24:20 - Outro
Written and hosted by Paul M. Sutter
Editing by Poncho Productions
![Whats Really Inside Empty Space? [Ask a Spaceman]](https://i.ytimg.com/vi/wRsWWR8BVIo/mqdefault.jpg "Whats Really Inside Empty Space? [Ask a Spaceman]
Support: http://www.patreon.com/pmsutter
0:00 - Intro
2:20 - Whole Lotta Nothing
10:14 - Ottos Vacuum
18:03 - Theres Always Something
22:07 - Vacuum Energy
27:29 - Is Space Really Empty?
36:24 - Gravitational Waves
39:40 - Thank You
Follow all the show updates at http://www.askaspaceman.com, and help support the show at http://www.patreon.com/pmsutter!
What’s floating around in space between all the stuff? Are there any truly empty places in the universe? What is the “fabric” of spacetime? I discuss these questions and more in today’s Ask a Spaceman!
Keep those questions about space, science, astronomy, astrophysics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE!")
