Plural of aerostat; multiple lighter-than-air aircraft such as balloons or airships.
Simple plural of 'aerostat,' formed by adding '-s.' This term is used when discussing multiple buoyant aircraft or the category as a whole.
Modern aerostats are making a comeback in scientific research and tourism—weather agencies use tethered aerostats to measure atmospheric conditions at different altitudes, and recreational hot air balloon festivals attract thousands of spectators watching dozens of colorful aerostats rise together at dawn.
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