Flames and Zero Gravity

Question: If an astronaut is in a space station at zero g's, and he strikes a 
match, how will the flame burn (in what direction) assuming an atmosphere 
similar to that on earth?
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The flame would be mostly spherical since there is no gravity.  
But that means there would be no convection either, so the flame extinguishes 
itself fairly quickly.  I think this has been demonstrated on one of the space 
shuttle flights.

John Hawley
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