An "orbit" is the curved path that an object takes as it moves around another object in space due to the force of gravity. For example, the Earth orbits the Sun, completing one full revolution approximately every 365 days. This gravitational pull keeps the planets, moons, and other celestial bodies in their respective paths. Orbits can vary in shape and size. Some orbits are circular, while others are elliptical, meaning they are stretched out like an oval. The Moon orbits the Earth in a similar manner, taking about 27.3 days to complete one cycle. Understanding orbits helps scientists study the movement of objects in the universe.