Perigee refers to the point in the orbit of the Moon or a satellite where it is closest to the Earth. This proximity can significantly affect the appearance of the Moon, making it appear larger and brighter in the sky during events like a supermoon. Understanding perigee is essential for astronomers and space enthusiasts alike, as it influences various phenomena, including tides and satellite operations. The opposite of perigee is apogee, which is the point where the orbiting body is farthest from the Earth. The variations in distance during these points can lead to interesting visual effects and are crucial for planning space missions and observing celestial events.