Gas balloon
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A gas balloon is a kind of balloon that uses a gas of low density to fly using buoyancy. Gas balloons sometimes fly very high, very far, and for a very long time.
A gas balloon is different from a hot air balloon. A hot air balloon uses a fire to lower the density of air. A gas balloon does not use fire.
The most common use for gas balloons are to measure the atmosphere. These are called weather balloons.
Some gas balloons carry people.
Gas Balloon Media
The first launch of a gas balloon by Jacques Charles and Les Frères Robert, 27 August 1783, at the Champ de Mars, Paris. Illustration from the late 19th century.
1900 Olympics ballooning event at Le Parc d'aerostation, Paris
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