Image: Live ScienceWhy does metal stick together in space?
• The phenomenon known as "cold welding" occurs in space when two clean pieces of the same metal touch and fuse together into a single piece. • Unlike on Earth, where an oxide layer forms on metal surfaces due to oxygen, the vacuum of space prevents this layer from developing, allowing atoms to bond directly. • This process is critical for space exploration as it can cause moving parts or tools to seize up, potentially jeopardizing satellite operations and astronaut missions.
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