Balloons are a type of aircraft that is supported in air by buoyancy, which in effect, makes the airship lighter than air.
In the holographic program titled Julian Bashir, Secret Agent, Hippocrates Noah described his plan cause the surface of the Earth to shrink as being "just like letting air out of a balloon." (DS9: "Our Man Bashir")
Types of balloons
The Union Army Balloon Corps operated and/or built eight hydrogen-gas balloons from 1861 – 1863.
- Small balloons: Enterprise, Eagle, Constitution, and Washington
- Large balloons: Union, Excelsior, Intrepid, and United States