dirigibles
A dirigible is an airship, like a giant balloon in the sky that you can steer. Blimps and zeppelins are dirigibles.
Dirigibles, also called airships, fly by being lighter than air. This works because a dirigible is like a big hard balloon filled with lighter-than-air gas, such as helium or hydrogen. You've probably seen dirigibles used in advertising, like the Goodyear blimp. A famous dirigible accident was the Hindenburg crash
