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 lie along the Tropic of Capricorn include parts of Australia, Brazil, Chile, and South Africa. The regions within this tropic typically experience a warm climate, with distinct wet and dry seasons. This area is also home to diverse ecosystems, including deserts and rainforests.