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Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Since you’re here, you might be interested in a new, sciencey podcast: Science, possibly — science-adjacent stories by Chris Stewart and James Lees.

Things we talk about in this episode:

Virgin Galactic

Branson goes to space

Blue Origin

Bezos is going to space

The Kármán Line

Definitions of the edge of space