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skyhook balloon

noun
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Definition of skyhook balloon

: a large semitransparent helium-filled high-altitude plastic balloon used to carry instruments aloft for the study of cosmic rays

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“Skyhook balloon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/skyhook%20balloon. Accessed 20 Sep. 2020.

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