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1answer
187 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 ...
6
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2answers
147 views
relativistic spaceship, CMB radiation and thermodynamics
Scenario: a spaceship is travelling at a high fraction of $c$. The interstellar gas and CMB radiation has blueshifted significantly and we are facing a possible melting of the front radiation shield!
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2answers
185 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 ...
