0
votes
2answers
53 views

One Particle in a Vacuum

I recently watch a lecture by Neil Tyson where he said the closest thing we have to a vacuum is interstellar space. I believe he said there will be one atom per 1 cubic meter or something close to ...
0
votes
2answers
225 views

Why should space be empty? [duplicate]

Possible Duplicate: How vacuous is intergalactic space? The emptiness of space is explained in many articles... But, space does contain some matter due to these possible reasons: During ...
3
votes
3answers
86 views

What's in my box?

Let's say that I have a box which is 100% empty. I fly into the vacuum of space, open the box and close it after a certain time. Then I go back to earth and my question is.. What's in my box? ...
11
votes
1answer
540 views

How vacuous is intergalactic space?

You often hear intergalactic space is an example for a very good vacuum. But how vacuos is space between galaxy clusters and inside a huge void structure? Are there papers quoting a ...