Jude let a helium balloon go into the sky today and was really upset about it. I told him later on that it was ok because the balloon probably went to the moon. I started to wonder, how high will it actually go?
The record for the highest helium balloon is held by a British man, Ian Ashpole. He used 400 helium balloons and achieved a height of one mile or 1,575 yards without any of the balloons popping.
A helium balloon can reach a height of 9,000 meters or 29,537 feet. It can't go any higher because the helium in the balloon will expand and pop.
http://www.ehow.com/facts_7467764_high-balloon-go-before-pops_.html
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