Q and BA Episode 6: I Am Your Density

Q and BA Episode 6: I Am Your Density

Q and BA Episode 6: I Am Your Density

Bad Astronomy
The entire universe in blog form
March 11 2007 8:17 PM

Q and BA Episode 6: I Am Your Density

Space is a vacuum, right?

Phil Plait Phil Plait

Phil Plait writes Slate’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of Death From the Skies!  

Well, not exactly. It's all pretty empty on a cubic centimeter by cubic centimeter basis, but how empty is it?

Advertisement

Find out in this week's episode of Q & BA: I Am Your Density.

Viewing options:

Watch it right here, right now!

Advertisement
Advertisement

Show notes

The Question:

Advertisement

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.