How were Alexander Calder’s stabiles different from his mobiles?

The primary difference between the mobiles and stabiles created by American artist Alexander Calder lies in their movement and physical structure:

• Mobiles: These are typically suspended assemblies made of sheet metal and wire that are designed to be activated by air currents, allowing them to move in space.12
• Stabiles: As the name suggests, these are stationary works. While mobiles rely on actual motion, stabiles are monumental, bolted sheet-metal structures that only imply movement.132

The term "stabile" was coined by artist Jean Arp in 1931 to distinguish these fixed sculptures from Calder’s kinetic works. Stabiles are often composed of flat, curvilinear metal shapes welded or riveted together and are frequently displayed as public art in parks and plazas.13