thumb|A modern aerostat used by the U.S. Department of Homeland Security, the [[Tethered Aerostat Radar System (TARS)]]
thumb|A modern aerostat used by the U.S. Department of Homeland Security, the [[Tethered Aerostat Radar System (TARS)]]
An aerostat (, via French) or lighter-than-air aircraft is an aircraft that relies on buoyancy to maintain flight. Aerostats include unpowered balloons (free-flying or tethered) and powered airships.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).