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Old 07 February 2007, 12:39 PM
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ganzfeld ganzfeld is offline
Join Date: 05 September 2005
Location: Kyoto, Japan
Posts: 23,786

Originally Posted by Troberg View Post
[A tube of water extedning into space] would work nicely.

Provided, of course, that the vacuum of space isn't more than 17 m or so higher than the ocean.
Actually, water at sea level would only rise about ten meters in the column. Unfortunately, sea water would rapidly evaporate into the vacuum causing it be less than perfect, eventually filling the column with water vapor and other gases. (Water evaporates in a vacuum.) Water barometers need to have something to prevent the water from evaporating, such as antifreeze.
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