The Tropic of Capricorn is an imaginary line located at approximately 23.5 degrees south of the equator. It marks the southernmost point where the sun can be directly overhead at noon during the summer solstice, which occurs around December 21 each year. This line is significant in geography and climate, as it helps define the boundaries of the tropics. Countries that the Tropic of Capricorn passes through include Brazil, Argentina, Chile, Paraguay, Namibia, Botswana, South Africa, and Australia. The regions near this line typically experience warm temperatures and distinct wet and dry seasons, contributing to diverse ecosystems and climates.