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Hoisting a telescope with helium

Many a child has forgotten to hold tight to the string of a helium balloon only to have it escape and rise until it disappeared in the glare of the sun. Helium balloons want to rise, but launching a balloon ...

dateSep 01, 2014 in Space Exploration
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What is the universe expanding into?

Come on, admit it, you've had this question. "Since astronomers know that the Universe is expanding, what's it expanding into? What's outside of the Universe?" Ask any astronomer and you'll get an unsatisfying ...

dateNov 28, 2013 in Space Exploration
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