A Conversation for Ask h2g2
When in Space...
cyberaunt Started conversation Jul 17, 2000
If I could blow a smoke ring in space, how long would it hang about?
When in Space...
26199 Posted Jul 18, 2000
For very little time indeed. Space being a vaccuum, the molecules would rapidly spread out over a very large area... normally, collisions with air molecules stop this happening. In a vaccuum, the particles just keep on going very quickly in whatever direction they happen to be going...
26199
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When in Space...
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