Space travel or the lack thereof.

Hosted by Steve Nerlich.

Dear Cheap Astronomy – Interstellar trade

As regular listeners are aware, here at Cheap Astronomy, we think faster than light travel just ain't going to happen. That limits your trade options a good deal if our potential alien trading partners are anywhere up to a hundred light years or more away.

Dear Cheap Astronomy – Why aren't we doing more with artificial gravity

Good question. As we've discussed on this podcast and as others have discussed on pretty much every space-related podcast there is, zero gravity – OK, microgravity – is really bad for you. Your bones dissolve, your muscles wither, your cardiovascular system is deconditioned, your eye geometry changes and if that's not bad enough your face gets all puffy too.

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The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu

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