Space is a vacuum, right?
Well, not exactly. It’s all pretty empty on a cubic centimeter by cubic centimeter basis, but how empty is it?
Find out in this week’s episode of Q & BA: I Am Your Density.
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Show notes
The Question:
The question was sent in by Walter L. Williams:
When we talk of the vacuum of space, is it a total vacuum or “pretty much” a vacuum? Could you elaborate, perhaps telling us how much matter might be in say a “liter of space”?Images and Links
The Orion Nebula and Carina cloud images are courtesy of NASA/Hubble/AURA
Barnard 68 is from the European Southern Observatory.
The marshmallow came from my baking drawer. When I was done, I ate it.
