The first gas balloon made its flight in August 1783.

It made use of cheap, simple gas balloons filled with hydrogen.

I mean, most of the planets, especially the bigger ones, are primitive gas balloons.

This can be done with hot air and gas balloon.

Since 1999, the park has been home to a moored gas balloon.

The phrase refers to the shape of a gas balloon when it loses pressure.

A gas balloon is different from a hot air balloon.

The most common use for gas balloons are to measure the atmosphere.

It is an elevating experience filling gas balloons for the Christmas party.

Drygalski was the first to use a gas balloon in Antarctica.