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Since its founding in 1958, NASA has led missions that have reshaped our understanding of Earth, the Moon, and the universe beyond.

It’s one of the most ambitious engineering projects ever built, created by a partnership of space agencies from around the world.

It includes old satellites, used rocket parts, and fragments from past collisions.

Behind their sleek designs is a lot of physics, especially when it comes to how they generate motion.

Zero gravity, or microgravity, is what astronauts experience when they’re orbiting Earth.

Apollo 11 was the first time humans set foot on another world.