The distance around the Earth is called the circumference. The Earth's circumference varies depending on whether it is measured around the equator or the poles; it is approximately 40,075 kilometers (24,901 miles) around the equator and about 40,008 kilometers (24,860 miles) around the poles due to the Earth's slightly oblate shape. This measurement is fundamental for understanding various geographical, navigational, and astronomical concepts, allowing scientists and researchers to study the Earth’s size and shape in relation to other celestial bodies.